| Nominal Species (n = 1149) | Present allocation (n = 997) | Ref. |
|---|---|---|
| Ancistrus abilhoai Bifi, Pavanelli & Zawadzki, 2009 | Ancistrus abilhoai | 83296 |
| Harttia absaberi Oyakawa, Fichberg & Langeani, 2013 | Harttia absaberi | 94714 |
| Hypostomus aburrensis Posada, 1909 | Chaetostoma aburrensis | 36713 |
| Rinelepis acanthicus Valenciennes, 1840 | Acanthicus hystrix | 36713 |
| Loricaria accipenser Shaw, 1804 | Loricariichthys maculatus | 36389 |
| Farlowella acestrichthys Pearson, 1924 | Farlowella nattereri | 36389 |
| Nannoxyropsis acicula Delapieve, Lehmann A & Reis, 2018 | Nannoxyropsis acicula | 116855 |
| Hemiodon acipenserinus Kner, 1853 | Hemiodontichthys acipenserinus | 36389 |
| Isorineloricaria acuarius Ray & Armbruster, 2016 | Isorineloricaria acuarius | 129253 |
| Hisonotus acuen Silva, Roxo & Oliveira, 2014 | Hisonotus acuen | 106073 |
| Chaetostomus aculeatus Perugia, 1891 | Megalancistrus parananus | 36713 |
| Plecostomus aculeatus Gronow, 1854 | Ancistrus temminckii | 36713 |
| Acestra acus Kner, 1853 | Farlowella acus | 26282 |
| Farlowella acus venezuelensis Martín Salazar, 1964 | Farlowella venezuelensis | 36389 |
| Loricaria acuta Valenciennes, 1840 | Loricariichthys acutus | 36389 |
| Oxyropsis acutirostris Miranda Ribeiro, 1951 | Oxyropsis acutirostris | 36885 |
| Acanthicus adonis Isbrücker & Nijssen, 1988 | Acanthicus adonis | 36713 |
| Rineloricaria aequalicuspis Reis & Cardoso, 2001 | Rineloricaria aequalicuspis | 40941 |
| Chaetostoma aequinoctiale Pellegrin, 1909 | Transancistrus aequinoctialis | 104644 |
| Otocinclus affinis Steindachner, 1877 | Otocinclus affinis | 116855 |
| Plecostomus affinis Steindachner, 1877 | Hypostomus affinis | 36817 |
| Rhinelepis agassizii Steindachner, 1877 | Pseudorinelepis genibarbis | 33318 |
| Paraloricaria agastor Isbrücker, 1979 | Paraloricaria agastor | 36389 |
| Plecostomus agna Miranda Ribeiro, 1907 | Hypostomus agna | 26282 |
| Ancistrus agostinhoi Bifi, Pavanelli & Zawadzki, 2009 | Ancistrus agostinhoi | 83296 |
| Ancistrus aguaboensis Fisch-Muller, Mazzoni & Weber, 2001 | Ancistrus aguaboensis | 40950 |
| Farlowella agustini Martín Salazar, 1964 | Farlowella vittata | 36389 |
| Epactionotus aky Azpelicueta, Casciotta, Almirón & Koerber, 2004 | Hisonotus aky | 80996 |
| Hypostomus alatus Castelnau, 1855 | Hypostomus alatus | 36817 |
| Hisonotus alberti Roxo, Silva, Waltz & Melo, 2016 | Hisonotus alberti | 128921 |
| Panaqolus albivermis Lujan, Steele & Velasquez, 2013 | Panaqolus albivermis | 93923 |
| Hemiancistrus albocinctus Ahl, 1936 | Ancistrus multispinis | 36713 |
| Panaque albomaculatus Kanazawa, 1958 | Panaqolus albomaculatus | 58032 |
| Plecostomus albopunctatus Regan, 1908 | Hypostomus albopunctatus | 36817 |
| Chaetostomus alga Cope, 1872 | Ancistrus hoplogenys | 36713 |
| Otothyropsis alicula Lippert, Calegari & Reis, 2014 | Otothyropsis alicula | 96503 |
| Pareiorhaphis alipionis Gosline, 1947 | Isbrueckerichthys alipionis | 42856 |
| Chaetostoma alternifasciatum Fowler, 1945 | Chaetostoma alternifasciatum | 36713 |
| Liposarcus altipinnis Günther, 1864 | Pterygoplichthys gibbiceps | 36817 |
| Loricaria altipinnis Breder, 1925 | Rineloricaria altipinnis | 36389 |
| Farlowella altocorpus Retzer, 2006 | Farlowella altocorpus | 58770 |
| Ancistrus amaris de Souza, Taphorn & Armbruster, 2019 | Ancistrus amaris | 119730 |
| Parotocinclus amazonensis Garavello, 1977 | Parotocinclus amazonensis | 6868 |
| Dekeyseria amazonica Rapp Py-Daniel, 1985 | Dekeyseria amazonica | 36713 |
| Loricaria amazonica Castelnau, 1855 | Loricariichthys maculatus | 36389 |
| Acestra amazonum Günther, 1864 | Farlowella amazonum | 36389 |
| Liposarcus ambrosettii Holmberg, 1893 | Pterygoplichthys ambrosettii | 58032 |
| Corymbophanes ameliae Lujan, Armbruster, Werneke, Teixeira & Lovejoy, 2019 | Corymbophanes ameliae | 130535 |
| Aphanotorulus ammophilus Armbruster & Page, 1996 | Aphanotorulus ammophilus | 129253 |
| Hypocolpterus analis Fowler, 1943 | Chaetostoma anale | 6868 |
| Plecostomus ancistroides Ihering, 1911 | Hypostomus ancistroides | 36817 |
| Corymbophanes andersoni Eigenmann, 1909 | Corymbophanes andersoni | 6868 |
| Plecostomus angipinnatus Leege, 1922 | Hypostomus angipinnatus | 36817 |
| Farlowella angosturae Martín Salazar, 1964 | Farlowella vittata | 36389 |
| Plecostomus angulicauda Steindachner, 1877 | Delturus angulicauda | 36817 |
| Rineloricaria anhaguapitan Ghazzi, 2008 | Rineloricaria anhaguapitan | 75800 |
| Pterygoplichthys anisitsi Eigenmann & Kennedy, 1903 | Pterygoplichthys ambrosettii | 58032 |
| Rineloricaria anitae Ghazzi, 2008 | Rineloricaria anitae | 75800 |
| Plecostomus annae Steindachner, 1881 | Aphanotorulus emarginatus | 129253 |
| Ancistrus annectens Regan, 1904 | Hypostomus annectens | 99824 |
| Chaetostoma anomala sovichthys Schultz, 1944 | Chaetostoma sovichthys | 36713 |
| Chaetostoma anomalum Regan, 1903 | Chaetostoma anomalum | 36713 |
| Gymnotocinclus anosteos Carvalho, Lehmann A. & Reis, 2008 | Gymnotocinclus anosteos | 79020 |
| Lasiancistrus anthrax Armbruster & Provenzano, 2000 | Pseudolithoxus anthrax | 40437 |
| Loricaria anus Valenciennes, 1835 | Loricariichthys anus | 36389 |
| Loricaria apeltogaster Boulenger, 1895 | Loricaria apeltogaster | 36389 |
| Loricaria apeltogaster amazonum Delsman, 1941 | Pseudohemiodon amazonum | 36389 |
| Pseudohemiodon apithanos Isbrücker & Nijssen, 1978 | Pseudohemiodon apithanos | 36389 |
| Microlepidogaster arachas Martins, Calegari & Langeani, 2013 | Microlepidogaster arachas | 92936 |
| Parotocinclus arandai Sarmento-Soares, Lehmann A. & Martins-Pinheiro, 2009 | Parotocinclus arandai | 81204 |
| Hypostomus arecuta Cardoso, Almirón, Casciotta, Aichino, Lizarralde & Montoya-Burgos, 2012 | Hypostomus arecuta | 91776 |
| Hemiancistrus arenarius Eigenmann & Allen, 1942 | Peckoltia bachi | 77026 |
| Plecostomus argus Fowler, 1943 | Hypostomus argus | 36817 |
| Parotocinclus aripuanensis Garavello, 1988 | Parotocinclus aripuanensis | 26706 |
| Hisonotus armatus Carvalho, Lehmann A., Pereira & Reis, 2008 | Hisonotus armatus | 78747 |
| Panaque armbrusteri Lujan, Hidalgo & Stewart, 2010 | Panaque armbrusteri | 85845 |
| Otocinclus arnoldi Regan, 1909 | Otocinclus arnoldi | 86395 |
| Otocinclus arnoldi (non Regan, 1909) | Otocinclus flexilis | 86395 |
| Rhinelepis aspera Spix & Agassiz, 1829 | Rhinelepis aspera | 36817 |
| Hypostomus asperatus Castelnau, 1855 | Hypostomus asperatus | 6868 |
| Chaetostomus aspidolepis Günther, 1867 | Hypostomus aspidolepis | 36713 |
| Plecostomus aspilogaster Cope, 1894 | Hypostomus aspilogaster | 36817 |
| Pseudancistrus asurini Silva, Roxo & Oliveira, 2015 | Pseudancistrus asurini | 99871 |
| Pseudancistrus atratoensis Dahl, 1960 | Dolichancistrus atratoensis | 36656 |
| Spatuloricaria atratoensis Schultz, 1944 | Spatuloricaria atratoensis | 36389 |
| Hypostomus aurantiacus Castelnau, 1855 | Parancistrus aurantiacus | 36713 |
| Hemiloricaria aurata Knaack, 2003 | Rineloricaria aurata | 58032 |
| Loricaria aurea Steindachner, 1900 | Sturisomatichthys aureum | 36389 |
| Scobinancistrus aureatus Burgess, 1994 | Scobinancistrus aureatus | 36713 |
| Hypostomus auroguttatus (non Kner, 1854) | Hypostomus luetkeni | 87757 |
| Hypostomus auroguttatus Kner, 1854 | Hypostomus auroguttatus | 36817 |
| Lamontichthys avacanoeiro de Carvalho Paixão & Toledo-Piza, 2009 | Lamontichthys avacanoeiro | 83332 |
| Farlowella azygia Eigenmann & Vance, 1917 | Farlowella nattereri | 36389 |
| Hemipsilichthys azygolechis Pereira & Reis, 2002 | Pareiorhaphis azygolechis | 42856 |
| Chaetostomus bachi Boulenger, 1898 | Peckoltia bachi | 36713 |
| Corymbophanes bahianus Gosline, 1947 | Pareiorhaphis bahianus | 42856 |
| Microlepidogaster bahiensis Miranda Ribeiro, 1918 | Parotocinclus bahiensis | 36885 |
| Crossoloricaria bahuaja Chang & Castro, 1999 | Rhadinoloricaria bahuaja | 32973 |
| Hypoptopoma baileyi Aquino & Schaefer, 2010 | Hypoptopoma baileyi | 84367 |
| Rineloricaria baliola Rodriguez & Reis, 2008 | Rineloricaria baliola | 75788 |
| Neoplecostomus bandeirante Roxo, Oliveira & Zawadzki, 2012 | Neoplecostomus bandeirante | 89726 |
| Dentectus barbarmatus Martín Salazar, Isbrücker & Nijssen, 1982 | Dentectus barbarmatus | 36389 |
| Loricaria barbata Kner, 1853 | Sturisoma barbatum | 36389 |
| Ancistrus barbatus Steindachner, 1911 | Pseudancistrus barbatus | 36713 |
| Hypostomus barbatus Valenciennes, 1840 | Pseudancistrus barbatus | 36713 |
| Ancistrus barrae Steindachner, 1910 | Megalancistrus barrae | 36713 |
| Hypostomus basilisko Tencatt, Zawadzki & Froehlich, 2014 | Hypostomus basilisko | 97225 |
| Panaque bathyphilus Lujan & Chamon, 2008 | Panaque bathyphilus | 79810 |
| Otocinclus batmani Lehmann A., 2006 | Otocinclus batmani | 75892 |
| Ancistrus baudensis Fowler, 1945 | Ancistrus centrolepis | 36713 |
| Baryancistrus beggini Lujan, Arce & Armbruster, 2009 | Baryancistrus beggini | 80502 |
| Loricaria beni Pearson, 1924 | Rineloricaria beni | 36389 |
| Otothyropsis biamnicus Calegari, Lehmann A. & Reis, 2013 | Otothyropsis biamnicus | 93039 |
| Hypoptopoma bianale Aquino & Schaefer, 2010 | Hypoptopoma bianale | 84367 |
| Plecostomus bicirrosus Gronow, 1854 | Hypostomus plecostomus | 36817 |
| Parotocinclus bidentatus Gauger & Buckup, 2005 | Parotocinclus bidentatus | 56918 |
| Chaetostoma bifurcum Lujan, Meza-Vargas, Astudillo-Clavijo, Barriga-Salazar & López-Fernández, 2015 | Chaetostoma bifurcum | 104727 |
| Epactionotus bilineatus Reis & Schaefer, 1998 | Epactionotus bilineatus | 36885 |
| Hypoptopoma bilobatum Cope, 1870 | Hypoptopoma thoracatum | 84367 |
| Hypostomus bimbai Zawadzki & Penido, 2021 | Hypostomus bimbai | 124776 |
| Loricaria birindellii Thomas & Sabaj Pérez, 2010 | Loricaria birindellii | 84258 |
| Plecostomus biseriatus Cope, 1872 | Aphanotorulus horridus | 129253 |
| Hisonotus bocaiuva Roxo, Silva, Oliveira & Zawadzki, 2013 | Hisonotus bocaiuva | 95507 |
| Hisonotus bockmanni Carvalho & Datovo, 2012 | Hisonotus bockmanni | 91046 |
| Farlowella boliviana Steindachner, 1910 | Farlowella gracilis | 36389 |
| Xenocara boliviana Steindachner, 1915 | Ancistrus bolivianus | 36713 |
| Plecostomus bolivianus Pearson, 1924 | Hypostomus bolivianus | 36817 |
| Plecostomus borellii Boulenger, 1897 | Hypostomus borellii | 36817 |
| Otocinclus bororo Schaefer, 1997 | Otocinclus bororo | 36885 |
| Neoplecostomus botucatu Roxo, Oliveira & Zawadzki, 2012 | Neoplecostomus botucatu | 89726 |
| Lithoxus boujardi Muller & Isbrücker, 1993 | Paralithoxus boujardi | 36713 |
| Plecostomus boulengeri Eigenmann & Kennedy, 1903 | Hypostomus boulengeri | 36817 |
| Microlepidogaster bourguyi Miranda Ribeiro, 1911 | Microlepidogaster bourguyi | 36885 |
| Ancistrus bovallii Regan, 1906 | Paralithoxus bovallii | 36713 |
| Pareiorhina brachyrhyncha Chamon, Aranda & Buckup, 2005 | Pareiorhina brachyrhyncha | 56057 |
| Ancistrus brachyurus Kner, 1854 | Dekeyseria brachyura | 36656 |
| Chaetostoma branickii Steindachner, 1881 | Chaetostoma branickii | 36713 |
| Loricaria bransfordi Gill, 1877 | Fonchiiichthys uracanthus | 36389 |
| Plecostomus brasiliensis Bleeker, 1862 | Hypostomus plecostomus | 90186 |
| Hemiancistrus braueri Eigenmann, 1912 | Peckoltia braueri | 36713 |
| Chaetostoma breve Regan, 1904 | Chaetostoma breve | 36713 |
| Neblinichthys brevibracchium Taphorn, Armbruster, López-Fernández & Bernard, 2010 | Neblinichthys brevibracchium | 85178 |
| Plecostomus brevicauda Günther, 1864 | Hypostomus brevicauda | 36817 |
| Ancistrus brevifilis Eigenmann, 1920 | Ancistrus brevifilis | 36713 |
| Ancistrus brevifilis bodenhameri Schultz, 1944 | Ancistrus bodenhameri | 36713 |
| Chaetostoma brevilabiatum Dahl, 1942 | Chaetostoma brevilabiatum | 36713 |
| Xenocara brevipinnis Regan, 1904 | Ancistrus brevipinnis | 36713 |
| Hypoptopoma brevirostratum Aquino & Schaefer, 2010 | Hypoptopoma brevirostratum | 84367 |
| Loricaria brevirostris Eigenmann & Eigenmann, 1889 | Sturisoma brevirostre | 36389 |
| Delturus brevis Reis & Pereira, 2006 | Delturus brevis | 57859 |
| Hemiancistrus brevis La Monte, 1935 | Peckoltia brevis | 36713 |
| Plecostomus brevis Nichols, 1919 | Hypostomus brevis | 36817 |
| Lasiancistrus brevispinis Heitmans, Nijssen & Isbrücker, 1983 | Guyanancistrus brevispinis | 99871 |
| Hypostomus brevitentaculatus Ranzani, 1841 | Pterygoplichthys etentaculatus | 36817 |
| Corumbataia britskii Ferreira & Ribeiro, 2007 | Corumbataia britskii | 57842 |
| Parotocinclus britskii Boeseman, 1974 | Parotocinclus britskii | 6868 |
| Rhinolekos britskii Martins, Langeani & Costa, 2011 | Rhinolekos britskii | 86681 |
| Guyanancistrus brownsbergensis Mol, Fisch-Muller & Covain, 2018 | Guyanancistrus brownsbergensis | 116863 |
| Loricaria brunnea Hancock, 1828 | Loricariichthys brunneus | 80565 |
| Hisonotus brunneus Carvalho & Reis, 2011 | Hisonotus brunneus | 86691 |
| Hypostomus bufonius Valenciennes, 1840 | Ancistrus bufonius | 36713 |
| Loricaria cacerensis Miranda Ribeiro, 1912 | Rineloricaria cacerensis | 36389 |
| Loricaria cadeae Hensel, 1868 | Rineloricaria cadeae | 36389 |
| Peckoltia caenosa Armbruster, 2008 | Peckoltia caenosa | 77026 |
| Hypostomus calamita Valenciennes, 1840 | Ancistrus bufonius | 36713 |
| Paulasquama callis Armbruster & Taphorn, 2011 | Paulasquama callis | 86603 |
| Isbrueckerichthys calvus Jerep, Shibatta, Pereira & Oyakawa, 2006 | Isbrueckerichthys calvus | 57731 |
| Psilichthys cameroni Steindachner, 1907 | Pareiorhaphis cameroni | 36817 |
| Otothyris canaliferus Myers, 1927 | Otothyris lophophanes | 28152 |
| Hisonotus candombe Casciotta, Azpelicueta, Almirón & Litz, 2006 | Hisonotus ringueleti | 80996 |
| Acanthicus canensis Meek & Hildebrand, 1913 | Leptoancistrus canensis | 36713 |
| Loricaria capetensis Meek & Hildebrand, 1913 | Dasyloricaria capetensis | 26282 |
| Rhinolekos capetinga Roxo, Ochoa, Silva & Oliveira, 2015 | Rhinolekos capetinga | 99822 |
| Rineloricaria capitonia Ghazzi, 2008 | Rineloricaria capitonia | 75800 |
| Peckoltia capitulata Fisch-Muller & Covain, 2012 | Peckoltia capitulata | 90183 |
| Euacanthagenys caquetae Fowler, 1945 | Spatuloricaria euacanthagenys | 36389 |
| Harttia caquetae Fowler, 1945 | Sturisoma caquetae | 36389 |
| Hemiancistrus caquetae Fowler, 1945 | Lasiancistrus schomburgkii | 58032 |
| Loricaria caquetae Fowler, 1943 | Spatuloricaria caquetae | 36389 |
| Hemiloricaria caracasensis Bleeker, 1862 | Rineloricaria caracasensis | 36389 |
| Monistiancistrus carachama Fowler, 1940 | Pseudorinelepis genibarbis | 33318 |
| Hypostomus careopinnatus Martins, Marinho, Langeani & Serra, 2012 | Hypostomus careopinnatus | 91756 |
| Farlowella carinata Garman, 1889 | Farlowella amazonum | 36389 |
| Hirtella carinata Pereira, Zanata, Cetra & Reis, 2014 | Hirtella carinata | 97864 |
| Loricaria carinata Castelnau, 1855 | Loricaria cataphracta | 36389 |
| Hypoptopoma carinatum Steindachner, 1879 | Oxyropsis carinata | 43109 |
| Plecostomus carinatus Steindachner, 1881 | Hypostomus carinatus | 36817 |
| Plecostomus carinotus La Monte, 1933 | Delturus carinotus | 36817 |
| Pseudancistrus carnegiei Eigenmann, 1916 | Dolichancistrus carnegiei | 36713 |
| Pareiorhina carrancas Bockmann & Ribeiro, 2003 | Pareiorhina carrancas | 52873 |
| Hisonotus carreiro Carvalho & Reis, 2011 | Hisonotus carreiro | 86691 |
| Lipopterichthys carrioni Norman, 1935 | Lipopterichthys carrioni | 36713 |
| Harttia carvalhoi Miranda Ribeiro, 1939 | Harttia carvalhoi | 36389 |
| Plecostomus carvalhoi Miranda Ribeiro, 1937 | Hypostomus carvalhoi | 36817 |
| Loricaria cashibo Eigenmann & Allen, 1942 | Loricariichthys cashibo | 36389 |
| Loricaria castanea Castelnau, 1855 | Loricariichthys castaneus | 36389 |
| Hemiancistrus castelnaui Miranda Ribeiro, 1911 | Lasiancistrus schomburgkii | 56920 |
| Rineloricaria castroi Isbrücker & Nijssen, 1984 | Rineloricaria castroi | 36389 |
| Loricaria catamarcensis Berg, 1895 | Rineloricaria catamarcensis | 36389 |
| Loricaria cataphracta Linnaeus, 1758 | Loricaria cataphracta | 36389 |
| Plecostomus cataphracta Gronow, 1854 | Loricariichthys maculatus | 36389 |
| Ancistrus caucanus Fowler, 1943 | Ancistrus caucanus | 36713 |
| Lasiancistrus caucanus Eigenmann, 1912 | Lasiancistrus caucanus | 36713 |
| Peckoltia cavatica Armbruster & Werneke, 2005 | Peckoltia cavatica | 54521 |
| Otocinclus caxarari Schaefer, 1997 | Otocinclus caxarari | 36885 |
| Parotocinclus cearensis Garavello, 1977 | Parotocinclus cearensis | 6868 |
| Ancistrus centrolepis Regan, 1913 | Ancistrus centrolepis | 36713 |
| Otocinclus cephalacanthus Miranda Ribeiro, 1911 | Otothyris lophophanes | 28152 |
| Crossoloricaria cephalaspis Isbrücker, 1979 | Crossoloricaria cephalaspis | 36389 |
| Pareiorhina cepta Roxo, da Costa e Silva, Mehanna & Oliveira, 2012 | Pareiorhina cepta | 92077 |
| Hemipsilichthys cerosus Miranda Ribeiro, 1951 | Pareiorhaphis cerosus | 42856 |
| Hemiancistrus cerrado de Souza, Melo, Chamon & Armbruster, 2008 | Hemiancistrus cerrado | 79076 |
| Parotocinclus cesarpintoi Miranda Ribeiro, 1939 | Parotocinclus cesarpintoi | 6868 |
| Ancistrus chagresi Eigenmann & Eigenmann, 1889 | Ancistrus chagresi | 36713 |
| Chaetostoma changae Salcedo, 2006 | Chaetostoma changae | 56969 |
| Panaque changae Chockley & Armbruster, 2002 | Panaqolus changae | 42939 |
| Parahemiodon chanjoo Fowler, 1940 | Loricariichthys chanjoo | 36389 |
| Plecostomus chaparae Fowler, 1940 | Aphanotorulus unicolor | 129253 |
| Hisonotus charrua Almirón, Azpelicueta, Casciotta & Litz, 2006 | Hisonotus charrua | 58032 |
| Brochiloricaria chauliodon Isbrücker, 1979 | Brochiloricaria chauliodon | 36389 |
| Hemiancistrus chlorostictus Cardoso & Malabarba, 1999 | Hemiancistrus chlorostictus | 36713 |
| Hisonotus chromodontus Britski & Garavello, 2007 | Hisonotus chromodontus | 75061 |
| Baryancistrus chrysolomus Rapp Py-Daniel, Zuanon & Ribeiro de Oliveira, 2011 | Baryancistrus chrysolomus | 87296 |
| Hypostomus chrysostiktos Birindelli, Zanata & Lima, 2007 | Hypostomus chrysostiktos | 75060 |
| Loricaria cirrhosa Bloch & Schneider, 1801 | Loricaria cataphracta | 36389 |
| Loricaria cirrhosa Perugia, 1897 | Spatuloricaria evansii | 36389 |
| Hypostomus cirrhosus Valenciennes, 1836 | Ancistrus cirrhosus | 36713 |
| Ancistrus cirrhosus dubius Eigenmann & Eigenmann, 1889 | Ancistrus dubius | 36713 |
| Chaetostomus cirrhosus maculatus Steindachner, 1881 | Ancistrus maculatus | 36713 |
| Chaetostomus cirrhosus punctata Steindachner, 1881 | Ancistrus hoplogenys | 36713 |
| Oxyloricaria citurensis Meek & Hildebrand, 1913 | Sturisomatichthys citurensis | 36389 |
| Ancistrus claro Knaack, 1999 | Ancistrus claro | 36713 |
| Panaqolus claustellifer Tan, Souza & Armbruster, 2016 | Panaqolus claustellifer | 109759 |
| Loricaria clavipinna Fowler, 1940 | Loricaria clavipinna | 36389 |
| Ancistrus clementinae Rendahl, 1937 | Ancistrus clementinae | 36713 |
| Otocinclus cocama Reis, 2004 | Otocinclus cocama | 57860 |
| Hypostomus cochliodon Kner, 1854 | Hypostomus cochliodon | 36817 |
| Parotocinclus collinsae Schmidt & Ferraris, 1985 | Parotocinclus collinsae | 6868 |
| Acestridium colombiense Retzer, 2005 | Acestridium colombiense | 58032 |
| Farlowella colombiensis Retzer & Page, 1997 | Farlowella colombiensis | 36389 |
| Hypostomus commersoni Valenciennes, 1836 | Hypostomus commersoni | 36817 |
| Plecostomus commersonii scabriceps Eigenmann & Eigenmann, 1888 | Hypostomus scabriceps | 36817 |
| Loricaria commersonoides Devincenzi, 1943 | Paraloricaria commersonoides | 36389 |
| Plecostomus commersonoides Marini, Nichols & La Monte, 1933 | Hypostomus laplatae | 121236 |
| Peckoltia compta De Oliveira, Zuanon, Rapp Py-Daniel & Rocha, 2010 | Peckoltia compta | 84541 |
| Apistoloricaria condei Isbrücker & Nijssen, 1986 | Rhadinoloricaria condei | 36389 |
| Hypancistrus contradens Armbruster, Lujan & Taphorn, 2007 | Hypancistrus contradens | 57950 |
| Hypostomus coppenamensis Boeseman, 1969 | Hypostomus coppenamensis | 6868 |
| Ancistrus coquenani Steindachner, 1915 | Pseudancistrus coquenani | 36713 |
| Hypostomus corantijni Boeseman, 1968 | Hypostomus corantijni | 6868 |
| Pseudancistrus corantijniensis De Chambrier & Montoya-Burgos, 2008 | Pseudancistrus corantijniensis | 79572 |
| Leptoancistrus cordobensis Dahl, 1964 | Leptoancistrus cordobensis | 36713 |
| Plecostomus cordovae Günther, 1880 | Hypostomus cordovae | 121236 |
| Neoplecostomus corumba Zawadzki, Pavanelli & Langeani, 2008 | Neoplecostomus corumba | 75575 |
| Loricaria coximensis Rodriguez, Cavallaro & Thomas, 2012 | Loricaria coximensis | 90156 |
| Curculionichthys coxipone Roxo, Silva, Ochoa & Oliveira, 2015 | Curculionichthys coxipone | 113800 |
| Harttia crassicauda Boeseman, 1953 | Harttiella crassicauda | 36389 |
| Hypostomus crassicauda Boeseman, 1968 | Hypostomus crassicauda | 6868 |
| Parotocinclus cristatus Garavello, 1977 | Parotocinclus cristatus | 6868 |
| Pseudohemiodon cryptodon Isbrücker, 1971 | Planiloricaria cryptodon | 36389 |
| Ancistrus cryptophthalmus Reis, 1987 | Ancistrus cryptophthalmus | 27297 |
| Leptotocinclus ctenistus Delapieve, Lehmann A & Reis, 2018 | Leptotocinclus ctenistus | 116855 |
| Loricaria cubataonis Steindachner, 1907 | Rineloricaria cubataonis | 36389 |
| Corumbataia cuestae Britski, 1997 | Corumbataia cuestae | 36885 |
| Ancistrus cuiabae Knaack, 1999 | Ancistrus cuiabae | 36713 |
| Farlowella curtirostra Myers, 1942 | Farlowella curtirostra | 36389 |
| Plesioptopoma curvidens Reis, Pereira & Lehmann A., 2012 | Plesioptopoma curvidens | 90155 |
| Loricaria curvispina Dahl, 1942 | Spatuloricaria curvispina | 36389 |
| Hemiancistrus daguae Eigenmann, 1912 | Cordylancistrus daguae | 36713 |
| Chaetostoma daidalmatos Salcedo, 2006 | Chaetostoma daidalmatos | 57692 |
| Xenocara damasceni Steindachner, 1907 | Ancistrus damasceni | 36713 |
| Rineloricaria daraha Rapp Py-Daniel & Fichberg, 2008 | Rineloricaria daraha | 79027 |
| Hypostomus dardanelos Zawadzki & Carvalho, 2014 | Hypostomus dardanelos | 95498 |
| Oxyloricaria dariensis Meek & Hildebrand, 1913 | Sturisomatichthys dariense | 36389 |
| Hypancistrus debilittera Armbruster, Lujan & Taphorn, 2007 | Hypancistrus debilittera | 57950 |
| Hypostomus delimai Zawadzki, de Oliveira & Debona, 2013 | Hypostomus delimai | 93220 |
| Baryancistrus demantoides Werneke, Sabaj Pérez, Lujan & Armbruster, 2005 | Baryancistrus demantoides | 56038 |
| Loricaria dentata Shaw, 1804 | Loricaria cataphracta | 36389 |
| Chaetostomus dentex Günther, 1868 | Panaqolus dentex | 36713 |
| Hypostomus denticulatus Zawadzki, Weber & Pavanelli, 2008 | Hypostomus denticulatus | 79067 |
| Harttia depressa Rapp Py-Daniel & Oliveira, 2001 | Harttia depressa | 39753 |
| Otocinclus depressicauda Miranda Ribeiro, 1918 | Hisonotus depressicauda | 36885 |
| Microlepidogaster depressinotus Miranda Ribeiro, 1918 | Hisonotus depressinotus | 36885 |
| Chaetostomus depressus Günther, 1868 | Pseudancistrus depressus | 36713 |
| Hemiodon depressus Kner, 1853 | Reganella depressa | 36389 |
| Loricariichthys derbyi Fowler, 1915 | Loricariichthys derbyi | 36389 |
| Plecostomus derbyi Haseman, 1911 | Hypostomus derbyi | 36817 |
| Chaetostoma dermorhynchum Boulenger, 1887 | Chaetostoma dermorhynchum | 36713 |
| Hisonotus devidei Roxo, Silva & Melo, 2018 | Hisonotus devidei | 128922 |
| Loricaria devincenzii Señorans, 1950 | Pseudohemiodon devincenzii | 36389 |
| Otothyropsis dialeukos Calegari, Morlis & Reis, 2017 | Otothyropsis dialeukos | 116501 |
| Acestridium dichromum Retzer, Nico & Provenzano, 1999 | Acestridium dichromum | 36885 |
| Microlepidogaster dimorpha Martins & Langeani, 2011 | Microlepidogaster dimorpha | 86675 |
| Hisonotus dinizae Ribeiro-Silva, Silva, Venere, da Silva & Roxo, 2020 | Hisonotus dinizae | 128923 |
| Rhinotocinclus discolor Reis & Lehmann, 2022 | Rhinotocinclus discolor | 128924 |
| Microlepidogaster discontenta Calgari, Silva & Reis, 2014 | Microlepidogaster discontenta | 98822 |
| Acestridium discus Haseman, 1911 | Acestridium discus | 36885 |
| Microlepidogaster discus Martins, Rosa & Langeani, 2014 | Microlepidogaster discus | 97523 |
| Liposarcus disjunctivus Weber, 1991 | Pterygoplichthys disjunctivus | 52299 |
| Harttia dissidens Rapp Py-Daniel & Oliveira, 2001 | Harttia dissidens | 39753 |
| Hypostomus dlouhyi Weber, 1985 | Hypostomus dlouhyi | 36817 |
| Microlepidogaster doceanus Miranda Ribeiro, 1918 | Parotocinclus doceanus | 36885 |
| Neoplecostomus doceensis Roxo, Silva, Zawadzki & Oliveira, 2014 | Neoplecostomus doceensis | 106072 |
| Ancistrus dolichopterus Kner, 1854 | Ancistrus dolichopterus | 36713 |
| Chaetostoma dorsale Eigenmann, 1922 | Chaetostoma dorsale | 36713 |
| Lasiancistrus dumus Armbruster & Provenzano, 2000 | Pseudolithoxus dumus | 40437 |
| Hypostomus duodecimalis Valenciennes, 1840 | Pterygoplichthys etentaculatus | 36817 |
| Chaetostoma dupouii Fernández-Yépez, 1945 | Chaetostoma dupouii | 36713 |
| Loricaria dura Bleeker, 1862 | Loricaria cataphracta | 36389 |
| Harttia duriventris Rapp Py-Daniel & Oliveira, 2001 | Harttia duriventris | 39753 |
| Hemipsilichthys duseni Miranda Ribeiro, 1907 | Isbrueckerichthys duseni | 42856 |
| Neblinichthys echinasus Taphorn, Armbruster, López-Fernández & Bernard, 2010 | Neblinichthys echinasus | 85178 |
| Loricariichthys edentatus Reis & Pereira, 2000 | Loricariichthys edentatus | 36389 |
| Loricaria eigenmanni Pellegrin, 1908 | Rineloricaria eigenmanni | 36389 |
| Nannoplecostomus eleonorae Ribeiro, Lima & Pereira, 2012 | Nannoplecostomus eleonorae | 92524 |
| Hypoptopoma elongatum Aquino & Schaefer, 2010 | Hypoptopoma elongatum | 84367 |
| Hypostomus emarginatus Valenciennes, 1840 | Aphanotorulus emarginatus | 129253 |
| Isbrueckerichthys epakmos Pereira & Oyakawa, 2003 | Isbrueckerichthys epakmos | 52250 |
| Oxyropsis ephippia Aquino & Sabaj Pérez, 2016 | Nannoxyropsis ephippia | 110244 |
| Peckoltia ephippiata Armbruster, Werneke & Tan, 2015 | Peckoltia ephippiata | 99824 |
| Parotocinclus eppleyi Schaefer & Provenzano, 1993 | Parotocinclus eppleyi | 26706 |
| Chaetostoma eptingi Fowler, 1941 | Hypostomus eptingi | 6868 |
| Hypostomus ericae Hollanda Carvalho & Weber, 2005 | Hypostomus ericae | 56681 |
| Hypostomus ericius Armbruster, 2003 | Hypostomus ericius | 50589 |
| Hypostomus erinaceus Valenciennes, 1840 | Ancistrus erinaceus | 36713 |
| Andeancistrus eschwartzae Lujan, Meza-Vargas & Barriga-Salazar, 2015 | Andeancistrus eschwartzae | 104644 |
| Neoplecostomus espiritosantensis Langeani, 1990 | Neoplecostomus espiritosantensis | 37046 |
| Hypostoma etentaculatum Spix & Agassiz, 1829 | Pterygoplichthys etentaculatus | 36817 |
| Spatuloricaria euacanthagenys Isbrücker, 1979 | Spatuloricaria euacanthagenys | 36389 |
| Hemipsilichthys eurycephalus Pereira & Reis, 2002 | Pareiorhaphis eurycephalus | 42856 |
| Pristiancistrus eustictus Fowler, 1945 | Ancistrus eustictus | 36713 |
| Loricaria evansii Boulenger, 1892 | Spatuloricaria evansii | 36389 |
| Ancistrus falconensis Taphorn, Armbruster & Rodríguez-Olarte, 2010 | Ancistrus falconensis | 83461 |
| Loricaria fallax Steindachner, 1915 | Rineloricaria fallax | 36389 |
| Hypostomus faveolus Zawadzki, Birindelli & Lima, 2008 | Hypostomus faveolus | 79072 |
| Peckoltia feldbergae de Oliveira, Rapp Py-Daniel, Zuanon & Rocha, 2012 | Ancistomus feldbergae | 91751 |
| Loricaria felipponei Fowler, 1943 | Rineloricaria felipponei | 36389 |
| Niobichthys ferrarisi Schaefer & Provenzano, 1998 | Niobichthys ferrarisi | 30400 |
| Plecostomus festae Boulenger, 1898 | Isorineloricaria spinosissima | 36817 |
| Sturisoma festivum Myers, 1942 | Sturisomatichthys festivum | 110098 |
| Harttia filamentissima Eigenmann & Allen, 1942 | Lamontichthys filamentosus | 36389 |
| Harttia filamentosa La Monte, 1935 | Lamontichthys filamentosus | 36389 |
| Loricaria filamentosa Steindachner, 1878 | Dasyloricaria filamentosa | 26282 |
| Loricaria filamentosa latiura Eigenmann & Vance, 1912 | Dasyloricaria latiura | 26282 |
| Loricaria filamentosa seminuda Eigenmann & Vance, 1912 | Dasyloricaria seminuda | 26282 |
| Peckoltichthys filicaudatus Miranda Ribeiro, 1917 | Peckoltia bachi | 77026 |
| Loricaria fimbriata (non Eigenmann & Vance, 1912) | Dasyloricaria filamentosa | 26543 |
| Loricaria fimbriata Eigenmann & Vance, 1912 | Spatuloricaria fimbriata | 36389 |
| Otocinclus fimbriatus Cope, 1894 | Otocinclus flexilis | 36885 |
| Pseudacanthicus fimbriatus Steindachner, 1915 | Exastilithoxus fimbriatus | 36656 |
| Chaetostoma fischeri Steindachner, 1879 | Chaetostoma fischeri | 36713 |
| Plecostomus flagellaris Gronow, 1854 | Loricaria cataphracta | 36389 |
| Loricaria flava Shaw, 1804 | Hypostomus plecostomus | 36817 |
| Otocinclus flexilis Cope, 1894 | Otocinclus flexilis | 36885 |
| Chaetostoma floridablancaensis Ardila Rodríguez, 2013 | Chaetostoma floridablancaensis | 123877 |
| Parotocinclus fluminense Roxo, Melo, Silva & Oliveira, 2017 | Parotocinclus fluminense | 117349 |
| Harttia fluminensis Covain & Fisch-Muller, 2012 | Harttia fluminensis | 90209 |
| Plecostomus fluviatilis Schubart, 1964 | Hypostomus fluviatilis | 36817 |
| Hypostomus fonchii Weber & Montoya-Burgos, 2002 | Hypostomus fonchii | 36817 |
| Chaetostomus fordii Günther, 1868 | Pseudacanthicus fordii | 36713 |
| Microplecostomus forestii Silva, Roxo, Ochoa & Oliveira, 2016 | Microplecostomus forestii | 115935 |
| Rineloricaria formosa Isbrücker & Nijssen, 1979 | Rineloricaria formosa | 36389 |
| Chaetostoma formosae Ballen, 2011 | Chaetostoma formosae | 88853 |
| Ancistrus formoso Sabino & Trajano, 1997 | Ancistrus formoso | 36713 |
| Oxyloricaria fowleri Pellegrin, 1908 | Harttia fowleri | 36389 |
| Otocinclus francirochai Ihering, 1928 | Hisonotus francirochai | 36885 |
| Plecostomus francisci Lütken, 1874 | Hypostomus francisci | 36817 |
| Neoplecostomus franciscoensis Langeani, 1990 | Neoplecostomus franciscoensis | 37046 |
| Aphanotorulus frankei Isbrücker & Nijssen, 1983 | Aphanotorulus unicolor | 129253 |
| Loricaria frenata Boulenger, 1902 | Sturisomatichthys frenatum | 36389 |
| Ancistrus fuesslii Steindachner, 1911 | Dolichancistrus fuesslii | 36656 |
| Hemiancistrus fugleri Ovchynnyk, 1971 | Hypostomus fugleri | 36713 |
| Hemiancistrus fuliginosus Cardoso & Malabarba, 1999 | Hemiancistrus fuliginosus | 36713 |
| Xenocara fulva Holly, 1929 | Ancistrus fulvus | 36713 |
| Chaetostoma furcatum Fowler, 1940 | Peckoltia furcata | 6868 |
| Hemiancistrus furtivus Provenzano & Barriga Salazar, 2017 | Hemiancistrus furtivus | 115566 |
| Hypancistrus furunculus Armbruster, Lujan & Taphorn, 2007 | Hypancistrus furunculus | 57950 |
| Ancistrus galani Pérez & Viloria, 1994 | Ancistrus galani | 41029 |
| Leporacanthicus galaxias Isbrücker & Nijssen, 1989 | Leporacanthicus galaxias | 33175 |
| Pareiorhaphis garapia Pareira, Lehmann A., Schvambach & Reis, 2015 | Pareiorhaphis garapia | 105131 |
| Harttia garavelloi Oyakawa, 1993 | Harttia garavelloi | 36389 |
| Rhinolekos garavelloi Martins & Langeani, 2011 | Rhinolekos garavelloi | 86681 |
| Hemipsilichthys garbei Ihering, 1911 | Pareiorhaphis garbei | 58032 |
| Plecostomus garmani Regan, 1904 | Hypostomus garmani | 36817 |
| Rinelepis genibarbis Valenciennes, 1840 | Pseudorinelepis genibarbis | 33318 |
| Pseudancistrus genisetiger Fowler, 1941 | Pseudancistrus genisetiger | 53269 |
| Farlowella gianetii Ballen, Pastana & Peixoto, 2016 | Farlowella gianetii | 128466 |
| Ancistrus gibbiceps Kner, 1854 | Pterygoplichthys gibbiceps | 36817 |
| Otocinclus gibbosus Miranda Ribeiro, 1908 | Lampiella gibbosa | 58032 |
| Chaetostomus gigas Boulenger, 1895 | Megalancistrus parananus | 36713 |
| Acestra gladiolus Günther, 1864 | Farlowella amazonum | 36389 |
| Acestra gladius Boulenger, 1898 | Farlowella oxyrryncha | 36389 |
| Panaque gnomus Schaefer & Stewart, 1993 | Panaqolus gnomus | 26730 |
| Xenomystus gobio Lütken, 1874 | Hemipsilichthys gobio | 36817 |
| Plecostomus gomesi Fowler, 1942 | Aphanotorulus gomesi | 129253 |
| Plecostomus goyazensis Regan, 1908 | Hypostomus goyazensis | 36817 |
| Epactionotus gracilis Reis & Schaefer, 1998 | Epactionotus gracilis | 36885 |
| Farlowella gracilis Regan, 1904 | Farlowella gracilis | 36389 |
| Harttia gracilis Oyakawa, 1993 | Harttia gracilis | 36389 |
| Sturisoma graffini Londoño-Burbano, 2018 | Sturisoma graffini | 128471 |
| Hypostomus granosus Valenciennes, 1840 | Neoplecostomus granosus | 26282 |
| Peckoltia greedoi Armbruster, Werneke & Tan, 2015 | Peckoltia greedoi | 99824 |
| Chaetostoma greeni Isbrücker, 2001 | Ancistrus greeni | 104727 |
| Loricaria griseus Eigenmann, 1909 | Limatulichthys griseus | 36389 |
| Hypostomus guacari Lacepède, 1803 | Hypostomus plecostomus | 36817 |
| Hypostomus guacharote Valenciennes, 1840 | Lasiancistrus guacharote | 36713 |
| Hemiancistrus guahiborum Werneke, Armbruster, Lujan & Taphorn, 2005 | Hemiancistrus guahiborum | 56906 |
| Chaetostoma guairense Steindachner, 1881 | Chaetostoma guairense | 36713 |
| Lasiancistrus guapore Knaack, 2000 | Lasiancistrus schomburgkii | 58032 |
| Farlowella guaricensis Martín Salazar, 1964 | Farlowella vittata | 36389 |
| Ancistrus guentheri Regan, 1904 | Pseudancistrus guentheri | 36713 |
| Hypoptopoma guentheri Boulenger, 1895 | Hypoptopoma inexspectatum | 84367 |
| Microlepidogaster guentheri Miranda Ribeiro, 1918 | Schizolecis guentheri | |
| Oxyloricaria guentheri Regan, 1904 | Sturisoma guentheri | 36389 |
| Hypoptopoma guianense Boeseman, 1974 | Hypoptopoma guianense | 6868 |
| Harttia guianensis Rapp Py-Daniel & Oliveira, 2001 | Harttia guianensis | 39753 |
| Hypoptopoma gulare Cope, 1878 | Hypoptopoma gulare | 84367 |
| Hypoptopoma gulare (non Cope, 1878) | Hypoptopoma inexspectatum | 84367 |
| Hypostomus guttatus Valenciennes, 1840 | Pseudancistrus barbatus | 36713 |
| Acestridium gymnogaster Reis & Lehmann A., 2009 | Acestridium gymnogaster | 82432 |
| Loricaria gymnogaster Eigenmann & Vance, 1912 | Spatuloricaria gymnogaster | 36389 |
| Loricaria gymnogaster lagoichthys Schultz, 1944 | Spatuloricaria lagoichthys | 36389 |
| Ancistrus gymnorhynchus Kner, 1854 | Ancistrus gymnorhynchus | 36713 |
| Plecostomus gymnorhynchus Norman, 1926 | Hypostomus gymnorhynchus | 36817 |
| Hypostomus gymnorhynchus occidentalis Boeseman, 1968 | Hypostomus gymnorhynchus | 90186 |
| Hypostomus gymnorhynchus tapanahoniensis Boeseman, 1969 | Hypostomus gymnorhynchus | 90186 |
| Farlowella hahni Meinken, 1937 | Farlowella hahni | 36389 |
| Parotocinclus halbothi Lehmann A., Lazzarotto & Reis, 2014 | Parotocinclus halbothi | 95582 |
| Hemiancistrus hammarlundi Rendahl, 1937 | Hemiancistrus hammarlundi | 36713 |
| Farlowella hargreavesi Eigenmann, 1912 | Farlowella nattereri | 36389 |
| Parotocinclus haroldoi Garavello, 1988 | Parotocinclus haroldoi | 36885 |
| Farlowella hasemani Eigenmann & Vance, 1917 | Farlowella hasemani | 36389 |
| Otocinclus hasemani Steindachner, 1915 | Otocinclus hasemani | 36885 |
| Rineloricaria hasemani Isbrücker & Nijssen, 1979 | Rineloricaria hasemani | 36389 |
| Loricariichthys hauxwelli Fowler, 1915 | Loricariichthys hauxwelli | 36389 |
| Hypostomus hemicochliodon Armbruster, 2003 | Hypostomus hemicochliodon | 50589 |
| Plecostomus hemiurus Eigenmann, 1912 | Hypostomus hemiurus | 36817 |
| Farlowella henriquei Miranda Ribeiro, 1918 | Farlowella henriquei | 36389 |
| Loricaria henselii Steindachner, 1907 | Rineloricaria henselii | 36389 |
| Hypostomus heraldoi Zawadzki, Weber & Pavanelli, 2008 | Hypostomus heraldoi | 79067 |
| Plecostomus hermanni Ihering, 1905 | Hypostomus hermanni | 36817 |
| Chaetostomus heteracanthus Günther, 1869 | Lasiancistrus heteracanthus | 36713 |
| Leporacanthicus heterodon Isbrücker & Nijssen, 1989 | Leporacanthicus heterodon | 36713 |
| Hisonotus heterogaster Carvalho & Reis, 2011 | Hisonotus heterogaster | 86691 |
| Rineloricaria heteroptera Isbrücker & Nijssen, 1976 | Rineloricaria heteroptera | 36389 |
| Xenocara heterorhynchus Regan, 1912 | Ancistrus heterorhynchus | 36713 |
| Plecostomus heylandi Boulenger, 1900 | Kronichthys heylandi | 36817 |
| Loricaria histrix Vandelli, 1840 | Pseudacanthicus histrix | 26282 |
| Rinelepis histrix Valenciennes, 1840 | Pseudacanthicus histrix | 36713 |
| Exastilithoxus hoedemani Isbrücker & Nijssen, 1985 | Exastilithoxus hoedemani | 36713 |
| Loricaria hoehnei Miranda Ribeiro, 1912 | Rineloricaria hoehnei | 36389 |
| Loricaria holmbergi Rodríguez & Miquelarena, 2005 | Loricaria holmbergi | 78627 |
| Hemiancistrus holostictus Regan, 1913 | Hypostomus holostictus | 99824 |
| Plecostomus hondae Regan, 1912 | Hypostomus hondae | 36817 |
| Chaetostomus hoplogenys Günther, 1864 | Ancistrus hoplogenys | 36713 |
| Hypostomus hoplonites Rapp Py-Daniel, 1988 | Hypostomus hoplonites | 36817 |
| Otocinclus hoppei Miranda Ribeiro, 1939 | Otocinclus hoppei | 36885 |
| Hypostomus horridus Kner, 1854 | Aphanotorulus horridus | 6868 |
| Otocinclus huaorani Schaefer, 1997 | Otocinclus huaorani | 36885 |
| Hisonotus hungy Azpelicueta, Almirón, Casciotta & Koerber, 2007 | Hisonotus hungy | 72404 |
| Cochliodon hypostomus Kner, 1854 | Hypostomus cochliodon | 36817 |
| Hemipsilichthys hypselurus Pereira & Reis, 2002 | Pareiorhaphis hypselurus | 42856 |
| Pareiorhina hyptiorhachis Silva, Roxo & Oliveira, 2013 | Pareiorhina hyptiorhachis | 93835 |
| Acanthicus hystrix Spix & Agassiz, 1829 | Acanthicus hystrix | 36713 |
| Hemipsilichthys hystrix Pereira & Reis, 2002 | Pareiorhaphis hystrix | 42856 |
| Pseudotothyris ignota Martins, Britski & Langeani, 2014 | Pseudotothyris ignota | 116384 |
| Plecostomus iheringi Fowler, 1941 | Aphanotorulus gomesi | 129253 |
| Plecostomus iheringii Regan, 1908 | Hypostomus iheringii | 36817 |
| Spectracanthicus immaculatus Chamon & Rapp Py-Daniel, 2014 | Spectracanthicus immaculatus | 95496 |
| Hypoptopoma incognitum Aquino & Schaefer, 2010 | Hypoptopoma incognitum | 84367 |
| Aristommata inexspectata Holmberg, 1893 | Hypoptopoma inexspectatum | 80565 |
| Hypancistrus inspector Armbruster, 2002 | Hypancistrus inspector | 41483 |
| Hisonotus insperatus Britski & Garavello, 2003 | Curculionichthys insperatus | 113800 |
| Harttiella intermedia Covain & Fisch-Muller, 2012 | Harttiella intermedia | 90209 |
| Pseudotocinclus intermedius Nichols, 1919 | Pseudotocinclus tietensis | 36885 |
| Plecostomus interruptus Miranda Ribeiro, 1918 | Hypostomus interruptus | 36817 |
| Hisonotus iota Carvalho & Reis, 2009 | Hisonotus iota | 80996 |
| Rineloricaria isaaci Rodriguez & Miquelarena, 2008 | Rineloricaria isaaci | 79592 |
| Rhinotocinclus isabelae Reis & Lehmann, 2022 | Rhinotocinclus isabelae | 128924 |
| Farlowella isbruckeri Retzer & Page, 1997 | Farlowella isbruckeri | 36389 |
| Hypostomus isbrueckeri Reis, Weber & Malabarba, 1990 | Hypostomus isbrueckeri | 36817 |
| Hypostomus itacua Valenciennes, 1836 | Hypostomus itacua | 58032 |
| Curculionichthys itaim Roxo, Dias, Silva & Oliveira, 2017 | Curculionichthys itaim | 118146 |
| Epactionotus itaimbezinho Reis & Schaefer, 1998 | Epactionotus itaimbezinho | 36885 |
| Parotocinclus jacksoni Ramos, Lustosa-Costa, Barros-Neto & Barbosa, 2021 | Parotocinclus jacksoni | 124638 |
| Hypostomus jaguar Zanata, Sardeiro & Zawadzki, 2013 | Hypostomus jaguar | 93813 |
| Neoplecostomus jaguari Andrade & Langeani, 2014 | Neoplecostomus jaguari | 97853 |
| Plecostomus jaguribensis Fowler, 1915 | Hypostomus jaguribensis | 36817 |
| Pseudotothyris janeirensis Britski & Garavello, 1984 | Pseudotothyris janeirensis | 116384 |
| Harttiella janmoli Covain & Fisch-Muller, 2012 | Harttiella janmoli | 90209 |
| Lithoxus jantjae Lujan, 2008 | Avalithoxus jantjae | 79075 |
| Loricaria jaraguensis Steindachner, 1909 | Rineloricaria jaraguensis | 36389 |
| Lithoxus jariensis Silva, Covain, Oliveira & Roxo, 2017 | Paralithoxus jariensis | 118148 |
| Ancistrus jataiensis Fisch-Muller, Cardoso, da Silva & Bertaco, 2005 | Ancistrus jataiensis | 54498 |
| Farlowella jauruensis Eigenmann & Vance, 1917 | Farlowella jauruensis | 36389 |
| Liposarcus jeanesianus Cope, 1874 | Pterygoplichthys pardalis | 36817 |
| Liposarcus jeanesianus (non Cope, 1874) | Pterygoplichthys multiradiatus | 2059 |
| Chaetostoma jegui Rapp Py-Daniel, 1991 | Chaetostoma jegui | 36713 |
| Chaetostomus jelskii Steindachner, 1876 | Ancistrus jelskii | 36713 |
| Parotocinclus jequi Lehmann A., Koech Braun, Pereira & Reis, 2013 | Parotocinclus jequi | 94247 |
| Parotocinclus jimi Garavello, 1977 | Parotocinclus jimi | 6868 |
| Otocinclus joberti Vaillant, 1880 | Hypoptopoma gulare | 84367 |
| Plecostomus johnii Steindachner, 1877 | Hypostomus johnii | 36817 |
| Chaetostoma joropo Ballen, Urbano-Bonilla & Maldonado-Ocampo, 2016 | Chaetostoma joropo | 121198 |
| Leporacanthicus joselimai Isbrücker & Nijssen, 1989 | Leporacanthicus joselimai | 36713 |
| Glyptoperichthys joselimaianus Weber, 1991 | Pterygoplichthys joselimaianus | 58032 |
| Loricaria jubata Boulenger, 1902 | Rineloricaria jubata | 36389 |
| Parotocinclus jumbo Britski & Garavello, 2002 | Parotocinclus jumbo | 47353 |
| Otothyris juquiae Garavello, Britski & Schaefer, 1998 | Otothyris juquiae | 28152 |
| Pseudotocinclus juquiae Takako, Oliveira & Oyakawa, 2005 | Pseudotocinclus juquiae | 56904 |
| Otocinclus juruenae Ribeiro & Lehmann A., 2016 | Otocinclus juruenae | 110382 |
| Rineloricaria jurupari Londoño-Burbano & Urbano-Bonilla, 2018 | Rineloricaria jurupari | 123477 |
| Pterygoplichthys juvens Eigenmann & Kennedy, 1903 | Pterygoplichthys ambrosettii | 58032 |
| Corymbophanes kaiei Armbruster & Sabaj Pérez, 2000 | Corymbophanes kaiei | 36817 |
| Curculionichthys karipuna Silva, Roxo, Melo & Oliveira, 2016 | Curculionichthys karipuna | 112322 |
| Hypostomus karstenii Lütken, 1874 | Ancistrus gymnorhynchus | 36713 |
| Pseudancistrus kayabi Silva, Roxo & Oliveira, 2015 | Pseudancistrus kayabi | 99871 |
| Ancistrus kellerae de Souza, Taphorn & Armbruster, 2019 | Ancistrus kellerae | 119730 |
| Pseudolithoxus kelsorum Lujan & Birindelli, 2011 | Pseudolithoxus kelsorum | 87302 |
| Hypostomus khimaera Tencatt, Zawadzki & Froehlich, 2014 | Hypostomus khimaera | 97225 |
| Pseudolithoxus kinja Bifi, de Oliveira, Rapp Py-Daniel & Collins, 2018 | Pseudolithoxus kinja | 119352 |
| Loricaria kneri De Filippi, 1940 | Sturisomatichthys kneri | 56068 |
| Sturisoma kneri Ghazzi, 2005 | Sturisomatichthys kneri | 56068 |
| Acestra knerii Steindachner, 1882 | Farlowella knerii | 36389 |
| Panaqolus koko Fisch-Muller & Covain, 2012 | Pseudoqolus koko | 117193 |
| Loricaria konopickyi Steindachner, 1879 | Rineloricaria konopickyi | 36389 |
| Hypostomus kopeyaka Carvalho, Lima & Zawadzki, 2010 | Hypostomus kopeyaka | 83896 |
| Harttia kronei Miranda Ribeiro, 1908 | Harttia kronei | 36389 |
| Loricaria kronei Miranda Ribeiro, 1911 | Rineloricaria kronei | 36389 |
| Hypostomus kuarup Zawadzki, Birindelli & Lima, 2012 | Hypostomus kuarup | 91068 |
| Peckoltichthys kuhlmanni Miranda Ribeiro, 1920 | Peckoltia vittata | 77026 |
| Pseudancistrus kwinti Willink, Mol & Chernoff, 2010 | Pseudancistrus kwinti | 83369 |
| Apistoloricaria laani Nijssen & Isbrücker, 1988 | Rhadinoloricaria laani | 36389 |
| Loricaria labialis Boulenger, 1895 | Loricariichthys labialis | 36389 |
| Plecostomus lacerta Nichols, 1919 | Kronichthys lacerta | 30773 |
| Hisonotus laevior Cope, 1894 | Hisonotus laevior | 86691 |
| Loricaria laeviuscula Valenciennes, 1840 | Pseudoloricaria laeviuscula | 36389 |
| Loricaria lamina Günther, 1868 | Pseudohemiodon lamina | 36389 |
| Loricaria lanceolata Günther, 1868 | Rineloricaria lanceolata | 36389 |
| Hemiancistrus landoni Eigenmann, 1916 | Hemiancistrus landoni | 36713 |
| Neoplecostomus langeanii Roxo, Oliveira & Zawadzki, 2012 | Neoplecostomus langeanii | 89726 |
| Rineloricaria langei Ingenito, Ghazzi, Duboc & Abilhoa, 2008 | Rineloricaria langei | 79021 |
| Plecostomus laplatae Eigenmann, 1907 | Hypostomus laplatae | 121236 |
| Loricaria lata Eigenmann & Eigenmann, 1889 | Loricaria lata | 36389 |
| Loricaria laticeps Regan, 1904 | Pseudohemiodon laticeps | 36389 |
| Chaetostomus latifrons Günther, 1869 | Ancistrus latifrons | 36713 |
| Hypostomus latifrons Weber, 1986 | Hypostomus latifrons | 36817 |
| Loricaria latirostris Boulenger, 1900 | Rineloricaria latirostris | 36389 |
| Plecostomus latirostris Regan, 1904 | Hypostomus latirostris | 36817 |
| Farlowella latisoma Miranda Ribeiro, 1939 | Farlowella schreitmuelleri | 36389 |
| Oxyloricaria leightoni Regan, 1912 | Sturisomatichthys leightoni | 36389 |
| Harttia leiopleura Oyakawa, 1993 | Harttia leiopleura | 36389 |
| Ancistrus leoni de Souza, Taphorn & Armbruster, 2019 | Ancistrus leoni | 119730 |
| Stoneiella leopardus Fowler, 1914 | Pseudacanthicus leopardus | 36713 |
| Hisonotus leptochilus Cope, 1894 | Hisonotus laevior | 86691 |
| Chaetostoma lepturum Regan, 1912 | Chaetostoma lepturum | 36713 |
| Otocinclus leucofrenatus Miranda Ribeiro, 1908 | Hisonotus leucofrenatus | 6868 |
| Chaetostoma leucomelas Eigenmann, 1918 | Chaetostoma leucomelas | 36713 |
| Hypostomus leucophaeus Zanata & Pitanga, 2016 | Hypostomus leucophaeus | 110236 |
| Hisonotus leucophrys Carvalho & Reis, 2009 | Hisonotus leucophrys | 80996 |
| Chaetostomus leucostictus Günther, 1864 | Ancistrus leucostictus | 36713 |
| Rhinelepis levis Pearson, 1924 | Hypostomus levis | 30773 |
| Loraxichthys lexa Salcedo, 2013 | Loraxichthys lexa | 93320 |
| Plecostomus lexi Ihering, 1911 | Hypostomus lexi | 36817 |
| Corumbataia liliai Silva, Roxo, Souza & Oliveira, 2018 | Corumbataia liliai | 118639 |
| Loricaria lima Kner, 1853 | Rineloricaria lima | 36389 |
| Plecostomus lima Lütken, 1874 | Hypostomus lima | 36817 |
| Plecostomus lima atropinnis Eigenmann & Eigenmann, 1890 | Hypostomus atropinnis | 36817 |
| Loricaria lima microlepidota Steindachner, 1907 | Rineloricaria microlepidota | 36389 |
| Plecostomus limosus Eigenmann & Eigenmann, 1888 | Hypostomus spiniger | 121236 |
| Eurycheilichthys limulus Reis & Schaefer, 1998 | Eurycheilichthys limulus | 36885 |
| Peckoltia lineola Armbruster, 2008 | Peckoltia lineola | 77026 |
| Ancistrus lineolatus Fowler, 1943 | Ancistrus lineolatus | 36713 |
| Chaetostoma lineopunctatum Eigenmann & Allen, 1942 | Chaetostoma lineopunctatum | 36713 |
| Apistoloricaria listrorhinos Nijssen & Isbrücker, 1988 | Rhadinoloricaria listrorhinos | 36389 |
| Lithoxus lithoides Eigenmann, 1912 | Lithoxus lithoides | 36713 |
| Ancistrus lithurgicus Eigenmann, 1912 | Ancistrus lithurgicus | 36713 |
| Ancistrus lituratus Kner, 1854 | Pterygoplichthys lituratus | 36817 |
| Lamontichthys llanero Taphorn & Lilyestrom, 1984 | Lamontichthys llanero | 36389 |
| Chaetostoma loborhynchos Tschudi, 1846 | Chaetostoma loborhynchos | 36713 |
| Harttiella longicauda Covain & Fisch-Muller, 2012 | Harttiella longicauda | 90209 |
| Rineloricaria longicauda Reis, 1983 | Rineloricaria longicauda | 36389 |
| Microlepidogaster longicolla Calegari & Reis, 2010 | Microlepidogaster longicolla | 85171 |
| Ancistrus longimanus Kner, 1854 | Pterygoplichthys etentaculatus | 36817 |
| Harttia longipinna Langeani, Oyakawa & Montoya-Burgos, 2001 | Harttia longipinna | 36389 |
| Hemiancistrus longipinnis Kindle, 1895 | Baryancistrus longipinnis | 36713 |
| Plecostomus longiradiatus Holly, 1929 | Hypostomus longiradiatus | 36817 |
| Parotocinclus longirostris Garavello, 1988 | Parotocinclus longirostris | 26706 |
| Lasiancistrus longispinis Heitmans, Nijssen & Isbrücker, 1983 | Pseudancistrus longispinis | 36713 |
| Pareiorhaphis lophia Pereira & Zanata, 2014 | Pareiorhaphis lophia | 95497 |
| Rhinelepis lophophanes Eigenmann & Eigenmann, 1889 | Otothyris lophophanes | 28152 |
| Harttia loricariformis Steindachner, 1877 | Harttia loricariformis | 36389 |
| Rhinotocinclus loxochelis Reis & Lehmann, 2022 | Rhinotocinclus loxochelis | 128924 |
| Loricaria luciae Thomas, Rodriguez, Carvallaro, Froehlich & Macedo Corrêa e Castro, 2013 | Loricaria luciae | 94550 |
| Corumbataia lucianoi Silva, Roxo, Souza & Oliveira, 2018 | Corumbataia lucianoi | 118639 |
| Harttiella lucifer Covain & Fisch-Muller, 2012 | Harttiella lucifer | 90209 |
| Pseudancistrus luderwaldti Miranda Ribeiro, 1918 | Pareiorhaphis steindachneri | 58032 |
| Plecostomus luetkeni Steindachner, 1877 | Hypostomus luetkeni | 36817 |
| Plecostomus luetkeni (non Steindachner, 1877) | Hypostomus auroguttatus | 87757 |
| Peckoltia lujani Armbruster, Werneke & Tan, 2015 | Peckoltia lujani | 99824 |
| Hypancistrus lunaorum Armbruster, Lujan & Taphorn, 2007 | Hypancistrus lunaorum | 57950 |
| Loricaria lundbergi Thomas & Rapp Py-Daniel, 2008 | Loricaria lundbergi | 79031 |
| Hisonotus luteofrenatus Britski & Garavello, 2007 | Curculionichthys luteofrenatus | 113800 |
| Plecostomus luteomaculatus Devincenzi, 1942 | Hypostomus luteomaculatus | 36817 |
| Plecostomus luteus Godoy, 1980 | Hypostomus luteus | 36817 |
| Oxyloricaria lyra Regan, 1904 | Sturisoma lyra | 36389 |
| Rineloricaria maacki Ingenito, Ghazzi, Duboc & Abilhoa, 2008 | Rineloricaria maacki | 79021 |
| Panaque maccus Schaefer & Stewart, 1993 | Panaqolus maccus | 26730 |
| Hypoptopoma machadoi Aquino & Schaefer, 2010 | Hypoptopoma machadoi | 84367 |
| Chaetostoma machiquense Fernández-Yépez & Martín Salazar, 1953 | Chaetostoma machiquense | 36713 |
| Loricaria macrodon Kner, 1853 | Brochiloricaria macrodon | 26282 |
| Loricaria macromystax Günther, 1869 | Rhadinoloricaria macromystax | 36389 |
| Xenocara macrophthalma Pellegrin, 1912 | Ancistrus macrophthalmus | 36713 |
| Chaetostomus macrops Lütken, 1874 | Hemiancistrus macrops | 36713 |
| Loricaria macrops Regan, 1904 | Ricola macrops | 36389 |
| Plecostomus macrops Eigenmann & Eigenmann, 1888 | Hypostomus macrops | 36817 |
| Otocinclus macrospilus Eigenmann & Allen, 1942 | Otocinclus macrospilus | 36885 |
| Loricaria maculata Bloch, 1794 | Loricariichthys maculatus | 36389 |
| Parasturisoma maculata Boeseman, 1971 | Cteniloricaria maculata | 80565 |
| Chaetostomus maculatus Regan, 1904 | Ancistrus greeni | 36713 |
| Otocinclus maculicauda Steindachner, 1877 | Parotocinclus maculicauda | 36885 |
| Otocinclus maculipinnis Regan, 1912 | Hisonotus maculipinnis | 36885 |
| Hypostomus macushi Armbruster & de Souza, 2005 | Hypostomus macushi | 54531 |
| Leptotocinclus madeirae Delapieve, Lehmann A & Reis, 2018 | Leptotocinclus madeirae | 116855 |
| Plecostomus madeirae Fowler, 1913 | Aphanotorulus unicolor | 129253 |
| Loricaria magdalenae Steindachner, 1879 | Rineloricaria magdalenae | 36389 |
| Rineloricaria malabarbai Rodriguez & Reis, 2008 | Rineloricaria malabarbai | 75788 |
| Chaetostomus malacops Cope, 1872 | Ancistrus malacops | 36713 |
| Otocinclus mangaba Lehmann A., Mayer & Reis, 2010 | Otocinclus mangaba | 86269 |
| Rineloricaria maquinensis Reis & Cardoso, 2001 | Rineloricaria maquinensis | 40941 |
| Lamontichthys maracaibero Taphorn & Lilyestrom, 1984 | Lamontichthys maracaibero | 36389 |
| Hemiancistrus maracaiboensis Schultz, 1944 | Hypostomus maracaiboensis | 36713 |
| Lasiancistrus maracaiboensis Schultz, 1944 | Lasiancistrus guacharote | 56920 |
| Lasiancistrus maracaiboensis (non Schultz, 1944) | Lasiancistrus caucanus | 56920 |
| Ancistrus maracasae Fowler, 1946 | Ancistrus maracasae | 36713 |
| Otothyropsis marapoama Ribeiro, Carvalho & Melo, 2005 | Otothyropsis marapoama | 56895 |
| Chaetostoma marcapatae Regan, 1904 | Ancistrus marcapatae | 36713 |
| Hypancistrus margaritatus Tan & Armbruster, 2016 | Hypancistrus margaritatus | 114591 |
| Plecostomus margaritifer Regan, 1908 | Hypostomus margaritifer | 36817 |
| Plecostomus margaritifer butantanis Ihering, 1911 | Hypostomus margaritifer | 36817 |
| Rhinotocinclus marginalis Reis & Lehmann, 2022 | Rhinotocinclus marginalis | 128924 |
| Chaetostoma marginatum Regan, 1904 | Chaetostoma marginatum | 36713 |
| Otocinclus mariae Fowler, 1940 | Otocinclus mariae | 36885 |
| Farlowella mariaelenae Martín Salazar, 1964 | Farlowella mariaelenae | 36389 |
| Chaetostoma marmorescens Eigenmann & Allen, 1942 | Chaetostoma marmorescens | 36713 |
| Acestridium martini Retzer, Nico & Provenzano, 1999 | Acestridium martini | 36885 |
| Farlowella martini Fernández-Yépez, 1972 | Farlowella martini | 36389 |
| Ancistrus mattogrossensis Miranda Ribeiro, 1912 | Ancistrus mattogrossensis | 36713 |
| Ancistrus maximus de Oliveira, Zuanon, Zawadzki & Py-Daniel, 2015 | Ancistrus maximus | 103398 |
| Hemiancistrus mayoloi Eigenmann, 1912 | Lasiancistrus caucanus | 56920 |
| Ancistrus medians Kner, 1854 | Hemiancistrus medians | 36656 |
| Chaetostomus megacephalus Günther, 1868 | Hemiancistrus megacephalus | 36713 |
| Hisonotus megaloplax Carvalho & Reis, 2009 | Hisonotus megaloplax | 80996 |
| Hemiancistrus megalopteryx Cardoso, 2004 | Hemiancistrus megalopteryx | 52458 |
| Ancistrus megalostomus Pearson, 1924 | Ancistrus megalostomus | 36713 |
| Guyanancistrus megastictus Fisch-Muller, Mol & Covain, 2018 | Guyanancistrus megastictus | 116863 |
| Hemiancistrus meizospilos Cardoso & da Silva, 2004 | Hemiancistrus meizospilos | 54753 |
| Hypostomus melanephelis Zawadzki, Oliveira, Oliveira & Py-Daniel, 2015 | Hypostomus melanephelis | 103391 |
| Loricariichthys melanocheilus Reis & Pereira, 2000 | Loricariichthys melanocheilus | 36389 |
| Loricaria melanoptera Kner, 1854 | Hypostomus cochliodon | 36817 |
| Ancistrus melas Eigenmann, 1916 | Ancistrus centrolepis | 36713 |
| Plecostomus meleagris Marini, Nichols & La Monte, 1933 | Hypostomus meleagris | 36817 |
| Loricariichthys melini Schindler, 1959 | Rineloricaria melini | 36389 |
| Pyxiloricaria menezesi Isbrücker & Nijssen, 1984 | Pyxiloricaria menezesi | 36389 |
| Harttia merevari Provenzano, Machado-Allison, Chernoff, Willink & Petry, 2005 | Harttia merevari | 56912 |
| Loricaria microdon Eigenmann, 1909 | Loricariichthys microdon | 36389 |
| Loricaria microlepidogaster Regan, 1904 | Rineloricaria microlepidogaster | 36389 |
| Hypostomus micromaculatus Boeseman, 1968 | Hypostomus micromaculatus | 6868 |
| Hemiancistrus micrommatos Cardoso & Lucinda, 2003 | Ancistomus micrommatos | 49598 |
| Chaetostoma microps Günther, 1864 | Chaetostoma microps | 36713 |
| Harttia microps Eigenmann & Allen, 1942 | Pterosturisoma microps | 36389 |
| Plecostomus microps Steindachner, 1877 | Neoplecostomus microps | 26282 |
| Plecostomus microps Ihering, 1907 | Pareiorhina rudolphi | 36817 |
| Plecostomus micropunctatus La Monte, 1935 | Aphanotorulus unicolor | 129253 |
| Hypostomus microstomus Weber, 1987 | Hypostomus microstomus | 36817 |
| Chaetostoma milesi Fowler, 1941 | Chaetostoma milesi | 36713 |
| Otocinclus mimulus Axenrot & Kullander, 2003 | Otocinclus mimulus | 52874 |
| Ancistrus minutus Fisch-Muller, Mazzoni & Weber, 2001 | Ancistrus minutus | 40950 |
| Parotocinclus minutus Garavello, 1977 | Parotocinclus minutus | 6868 |
| Ancistrus miracollis Bifi, de Oliveira & Rapp Py-Daniel, 2019 | Ancistrus miracollis | 128813 |
| Rineloricaria misionera Rodríguez & Miquelarena, 2005 | Rineloricaria misionera | 54478 |
| Farlowella mitoupibo Ballen, Urbano-Bonilla & Zamudio, 2016 | Farlowella mitoupibo | 128477 |
| Chaetostoma mollinasum Pearson, 1937 | Chaetostoma mollinasum | 36713 |
| Sturisoma monopelte Fowler, 1914 | Sturisoma monopelte | 36389 |
| Xenocara montana Regan, 1904 | Ancistrus montanus | 36713 |
| Hisonotus montanus Carvalho & Reis, 2009 | Hisonotus montanus | 80996 |
| Canthopomus montebelloi Fowler, 1940 | Ixinandria steinbachi | 86762 |
| Rineloricaria morrowi Fowler, 1940 | Rineloricaria morrowi | 36389 |
| Pareiorhaphis mucurina Pereira, Pessali & Reis, 2018 | Pareiorhaphis mucurina | 119415 |
| Ancistrus mullerae Bifi, Pavanelli & Zawadzki, 2009 | Ancistrus mullerae | 83296 |
| Hypostomus multidens Jerep, Shibatta & Zawadzki, 2007 | Hypostomus multidens | 75037 |
| Hypostomus multiradiatus Hancock, 1828 | Pterygoplichthys multiradiatus | 36817 |
| Ancistrus multiradiatus alternans Regan, 1904 | Pterygoplichthys ambrosettii | 58032 |
| Ancistrus multispinis Holly, 1929 | Peckoltia multispinis | 36713 |
| Xenocara multispinis Regan, 1912 | Ancistrus multispinis | 36713 |
| Hopliancistrus munduruku Oliveira, Zuanon, Rapp Py-Daniel, Birindelli & Sousa, 2021 | Hopliancistrus munduruku | 125999 |
| Otocinclus mura Schaefer, 1997 | Otocinclus mura | 36885 |
| Parotocinclus muriaensis Gauger & Buckup, 2005 | Parotocinclus muriaensis | 56918 |
| Spectracanthicus murinus Nijssen & Isbrücker, 1987 | Spectracanthicus murinus | 36713 |
| Hemipsilichthys mutuca Oliveira & Oyakawa, 1999 | Pareiorhaphis mutuca | 32949 |
| Hypostomus mutucae Knaack, 1999 | Hypostomus mutucae | 36817 |
| Hypoptopoma muzuspi Aquino & Schaefer, 2010 | Hypoptopoma muzuspi | 84367 |
| Plecostomus myersi Gosline, 1947 | Hypostomus myersi | 36817 |
| Aposturisoma myriodon Isbrücker, Britski, Nijssen & Ortega, 1983 | Aposturisoma myriodon | 36389 |
| Ancistrus mystacinus Kner, 1854 | Lasiancistrus guacharote | 56920 |
| Fonchiiloricaria nanodon Rodriguez, Ortega & Covain, 2011 | Fonchiiloricaria nanodon | 87853 |
| Cteniloricaria napova Covain & Fisch-Muller, 2012 | Cteniloricaria napova | 90209 |
| Limatulichthys nasarcus Londoño-Burbano, Lefebvre & Lujan, 2014 | Limatulichthys nasarcus | 97714 |
| Guyanancistrus nassauensis Mol, Fisch-Muller & Covain, 2018 | Guyanancistrus nassauensis | 116863 |
| Pareiorhaphis nasuta Pereira, Vieira & Reis, 2007 | Pareiorhaphis nasuta | 75793 |
| Lasiancistrus nationi Fernández-Yépez, 1972 | Ancistrus gymnorhynchus | 83461 |
| Farlowella nattereri Steindachner, 1910 | Farlowella nattereri | 36389 |
| Microlepidogaster negomata Martins, Cherobim, Andrade & Langeani, 2017 | Microlepidogaster negomata | 115560 |
| Hypostomus nematopterus Isbrücker & Nijssen, 1984 | Hypostomus nematopterus | 6868 |
| Cordylancistrus nephelion Provenzano & Milani, 2006 | Cordylancistrus nephelion | 56900 |
| Hemiancistrus niceforoi Fowler, 1943 | Hypostomus niceforoi | 36817 |
| Hypostomus nickeriensis Boeseman, 1969 | Hypostomus corantijni | 90186 |
| Loricaria nickeriensis Isbrücker, 1979 | Loricaria nickeriensis | 36389 |
| Lasiancistrus nicoi Armbruster & Provenzano, 2000 | Pseudolithoxus nicoi | 40437 |
| Hemiancistrus niger Norman, 1926 | Pseudancistrus niger | 36713 |
| Plecostomus niger Marini, Nichols & La Monte, 1933 | Hypostomus niger | 36817 |
| Pseudancistrus nigrescens Eigenmann, 1912 | Pseudancistrus nigrescens | 36713 |
| Hypostomus nigricans Castelnau, 1855 | Parancistrus aurantiacus | 36713 |
| Loricaria nigricauda Regan, 1904 | Rineloricaria nigricauda | 36389 |
| Otocinclus nigricauda Boulenger, 1891 | Hisonotus nigricauda | 36885 |
| Sturisoma nigrirostrum Fowler, 1940 | Sturisoma nigrirostrum | 36389 |
| Chaetostomus nigrolineatus Peters, 1877 | Panaque nigrolineatus | 36713 |
| Plecostomus nigromaculatus Schubart, 1964 | Hypostomus nigromaculatus | 36817 |
| Hypostomus nigropunctatus Garavello, Britski & Zawadzki, 2012 | Hypostomus nigropunctatus | 91066 |
| Harttia nijsseni Boeseman, 1976 | Metaloricaria nijsseni | 36389 |
| Hemipsilichthys nimius Pereira, Reis, Souza & Lazzarotto, 2003 | Hemipsilichthys nimius | 50588 |
| Hypostomus niveatus Castelnau, 1855 | Baryancistrus niveatus | 36713 |
| Plecostomus niveatus La Monte, 1929 | Dekeyseria niveata | 36713 |
| Chaetostoma niveum Fowler, 1944 | Chaetostoma niveum | 36713 |
| Panaqolus nix Cramer & Rapp Py-Daniel, 2015 | Panaqolus nix | 104707 |
| Panaque nocturnus Schaefer & Stewart, 1993 | Panaqolus nocturnus | 26730 |
| Hisonotus notatus Eigenmann & Eigenmann, 1889 | Hisonotus notatus | 36885 |
| Hisonotus notopagos Carvalho & Reis, 2011 | Hisonotus notopagos | 86691 |
| Furcodontichthys novaesi Rapp Py-Daniel, 1981 | Furcodontichthys novaesi | 6868 |
| Harttia novalimensis Oyakawa, 1993 | Harttia novalimensis | 36389 |
| Hypostomus nudiceps Müller & Troschel, 1849 | Ancistrus nudiceps | 36713 |
| Chaetostoma nudirostre Lütken, 1874 | Chaetostoma nudirostre | 36713 |
| Loricaria nudirostris Kner, 1853 | Loricariichthys nudirostris | 36389 |
| Loricaria nudiventris Valenciennes, 1840 | Spatuloricaria nudiventris | 36389 |
| Parancistrus nudiventris Rapp Py-Daniel & Zuanon, 2005 | Parancistrus nudiventris | 56911 |
| Plecostomus nudiventris Fowler, 1941 | Hypostomus nudiventris | 36817 |
| Hemipsilichthys nudulus Reis & Pereira, 1999 | Pareiorhaphis nudulus | 32858 |
| Pogonopoma obscurum Quevedo & Reis, 2002 | Pogonopoma obscurum | 43112 |
| Plecostomus obtusirostris Steindachner, 1907 | Hypostomus obtusirostris | 36817 |
| Otocinclus obtusus Miranda Ribeiro, 1911 | Pseudotothyris obtusa | 116384 |
| Xenocara occidentalis Regan, 1904 | Ancistrus occidentalis | 36713 |
| Ancistrus occloi Eigenmann, 1928 | Ancistrus occloi | 36713 |
| Panaque oculeus Fowler, 1943 | Hypostomus oculeus | 36817 |
| Farlowella odontotumulus Retzer & Page, 1997 | Farlowella odontotumulus | 36389 |
| Chaetostomus oligospilus Günther, 1864 | Peckoltia oligospila | 36713 |
| Farlowella oliveirae Miranda Ribeiro, 1939 | Farlowella amazonum | 36389 |
| Hisonotus oliveirai Roxo, Zawadzki & Troy, 2014 | Curculionichthys oliveirai | 113800 |
| Apistoloricaria ommation Nijssen & Isbrücker, 1988 | Rhadinoloricaria ommation | 36389 |
| Lithoxancistrus orinoco Isbrücker, Nijssen & Cala, 1988 | Pseudancistrus orinoco | 53269 |
| Rineloricaria osvaldoi Fichberg & Chamon, 2008 | Rineloricaria osvaldoi | 79066 |
| Peckoltia otali Fisch-Muller & Covain, 2012 | Peckoltia otali | 90183 |
| Acestra oxyrryncha Kner, 1853 | Farlowella oxyrryncha | 36389 |
| Hisonotus pachysarkos Zawadzki, Roxo & da Graça, 2016 | Hisonotus pachysarkos | 128933 |
| Hypostomus pagei Armbruster, 2003 | Hypostomus pagei | 50589 |
| Lithoxus pallidimaculatus Boeseman, 1982 | Paralithoxus pallidimaculatus | 36713 |
| Chaetostoma palmeri Regan, 1912 | Chaetostoma palmeri | 36713 |
| Loricaria panamensis Eigenmann & Eigenmann, 1889 | Sturisomatichthys panamense | 36389 |
| Harttia panara Oyakawa, Fichberg & Rapp Py-Daniel, 2018 | Harttia panara | 117418 |
| Hemiancistrus pankimpuju Lujan & Chamon, 2008 | Peckoltia pankimpuju | 99824 |
| Eurycheilus pantherinus Reis & Schaefer, 1992 | Eurycheilichthys pantherinus | 26607 |
| Hypostomus pantherinus Kner, 1854 | Hypostomus pantherinus | 6868 |
| Pseudancistrus papariae Fowler, 1941 | Pseudancistrus papariae | 53269 |
| Hemipsilichthys papillatus Pereira, Oliveira & Oyakawa, 2000 | Hemipsilichthys papillatus | 45132 |
| Rhadinoloricaria papillosa Crispim-Rodrigues, Bernt, Waltz, Silva, Benine, Oliveira, Covain & Roxo, 2023 | Rhadinoloricaria papillosa | 128857 |
| Farlowella paraguayensis Retzer & Page, 1997 | Farlowella paraguayensis | 36389 |
| Rhinelepis paraguensis Borodin, 1927 | Otocinclus vittatus | 36885 |
| Loricaria parahemiodon Günther, 1864 | Loricariichthys maculatus | 36389 |
| Delturus parahybae Eigenmann & Eigenmann, 1889 | Delturus parahybae | 36817 |
| Pseudotocinclus parahybae Takako, Oliveira & Oyakawa, 2005 | Pseudotocinclus parahybae | 56904 |
| Rhinelepis parahybae Steindachner, 1877 | Pogonopoma parahybae | 43112 |
| Lamontichthys parakana de Carvalho Paixão & Toledo-Piza, 2009 | Lamontichthys parakana | 83332 |
| Farlowella paranaense Meinken, 1937 | Farlowella amazonum | 36389 |
| Pterygoplichthys parananus Peters, 1881 | Megalancistrus parananus | 6868 |
| Hypostomus paranensis Weyenbergh, 1877 | Hypostomus paranensis | 58032 |
| Neoplecostomus paranensis Langeani, 1990 | Neoplecostomus paranensis | 37046 |
| Hypostomus pardalis (non Castelnau, 1855) | Pterygoplichthys multiradiatus | 26660 |
| Hypostomus pardalis Castelnau, 1855 | Pterygoplichthys pardalis | 36817 |
| Ancistrus parecis Fisch-Muller, Cardoso, da Silva & Bertaco, 2005 | Ancistrus parecis | 56914 |
| Loricaria pareiacantha Fowler, 1943 | Rineloricaria pareiacantha | 36389 |
| Hisonotus paresi Roxo, Zawadzki & Troy, 2014 | Curculionichthys paresi | 113800 |
| Scobinancistrus pariolispos Isbrücker & Nijssen, 1989 | Scobinancistrus pariolispos | 36713 |
| Pareiorhaphis parmula Pereira, 2005 | Pareiorhaphis parmula | 56652 |
| Loricaria parnahybae Steindachner, 1907 | Loricaria parnahybae | 36389 |
| Loricariichthys parnahybae Fowler, 1941 | Limatulichthys griseus | 36389 |
| Glyptoperichthys parnaibae Weber, 1991 | Pterygoplichthys parnaibae | 58032 |
| Harttiella parva Covain & Fisch-Muller, 2012 | Harttiella parva | 90209 |
| Loricaria parva Boulenger, 1895 | Rineloricaria parva | 36389 |
| Farlowella parvicarinata Boeseman, 1971 | Farlowella rugosa | 36389 |
| Hypostomus pastinhai Zawadzki & Penido, 2021 | Hypostomus pastinhai | 124776 |
| Chaetostoma patiae Fowler, 1945 | Chaetostoma patiae | 36713 |
| Ancistrus patronus de Souza, Taphorn & Armbruster, 2019 | Ancistrus patronus | 119730 |
| Metaloricaria paucidens Isbrücker, 1975 | Metaloricaria paucidens | 6868 |
| Hypostomus paucimaculatus Boeseman, 1968 | Hypostomus paucimaculatus | 6868 |
| Hypostomus paucipunctatus Hollanda Carvalho & Weber, 2005 | Hypostomus paucipunctatus | 56681 |
| Chaetostoma paucispinis Regan, 1912 | Chaetostoma paucispinis | 36713 |
| Dasyloricaria paucisquama Londoño-Burbano & Reis, 2016 | Dasyloricaria paucisquama | 118067 |
| Loricaria paulina Boulenger, 1900 | Rineloricaria latirostris | 36389 |
| Otocinclus paulinus Regan, 1908 | Hisonotus paulinus | 36885 |
| Plecostomus paulinus Ihering, 1905 | Hypostomus paulinus | 36817 |
| Chaetostoma pearsei Eigenmann, 1920 | Chaetostoma pearsei | 36713 |
| Hypostomus peckoltoides Zawadzki, Weber & Pavanelli, 2010 | Hypostomus peckoltoides | 85849 |
| Pseudancistrus pectegenitor Lujan, Armbruster & Sabaj Pérez, 2007 | Pseudancistrus pectegenitor | 58451 |
| Pseudancistrus pediculatus Eigenmann, 1918 | Dolichancistrus pediculatus | 36713 |
| Pseudancistrus pediculatus cobrensis Schultz, 1944 | Dolichancistrus cobrensis | 36713 |
| Pareiorhina pelicicei Azevedo-Santos & Roxo, 2015 | Pareiorhina pelicicei | 100791 |
| Plecostomus pellegrini Regan, 1904 | Pseudorinelepis genibarbis | 33318 |
| Neblinichthys peniculatus Armbruster & Taphorn, 2013 | Neblinichthys peniculatus | 93221 |
| Rineloricaria pentamaculata Langeani & de Araujo, 1994 | Rineloricaria pentamaculata | 36389 |
| Hypostomus perdido Zawadzki, Tencatt & Froehlich, 2014 | Hypostomus perdido | 95502 |
| Microlepidogaster perforata Eigenmann & Eigenmann, 1889 | Microlepidogaster perforata | 116855 |
| Microlepidogaster perforatus Eigenmann & Eigenmann, 1889 | Microlepidogaster perforata | 36885 |
| Cordylancistrus perijae Pérez & Provenzano, 1996 | Cordylancistrus perijae | 40935 |
| Rhineloricaria petleyi Fowler, 1940 | Limatulichthys griseus | 36389 |
| Hypancistrus phantasma Tan & Armbruster, 2016 | Hypancistrus phantasma | 114591 |
| Spatuloricaria phelpsi Schultz, 1944 | Spatuloricaria phelpsi | 36389 |
| Loricaria phoxocephala Eigenmann & Eigenmann, 1889 | Rineloricaria phoxocephala | 36389 |
| Plecostomus phrixosoma Fowler, 1940 | Aphanotorulus phrixosoma | 129253 |
| Loricaria piauhiae Fowler, 1941 | Loricaria parnahybae | 36389 |
| Ancistrus pictus Kner, 1854 | Dekeyseria picta | 36713 |
| Hypostomus pictus Castelnau, 1855 | Lasiancistrus schomburgkii | 56920 |
| Harttiella pilosa Covain & Fisch-Muller, 2012 | Harttiella pilosa | 90209 |
| Neblinichthys pilosus Ferraris, Isbrücker & Nijssen, 1986 | Neblinichthys pilosus | 36713 |
| Rhinotocinclus pilosus Reis & Lehmann, 2022 | Rhinotocinclus pilosus | 128924 |
| Hisonotus piracanjuba Martins & Langeani, 2012 | Curculionichthys piracanjuba | 113800 |
| Loricaria piracicabae Ihering, 1907 | Loricaria piracicabae | 36389 |
| Pseudacanthicus pirarara Chamon & Sousa, 2016 | Pseudacanthicus pirarara | 117420 |
| Ancistrus pirareta Muller, 1989 | Ancistrus pirareta | 36713 |
| Hypostomus piratatu Weber, 1986 | Hypostomus piratatu | 36817 |
| Otothyropsis piribebuy Calegari, Lehmann A. & Reis, 2011 | Otothyropsis piribebuy | 87312 |
| Ancistrus piriformis Muller, 1989 | Ancistrus piriformis | 36713 |
| Pseudacanthicus pitanga Chamon, 2015 | Pseudacanthicus pitanga | 102632 |
| Parotocinclus planicauda Garavello & Britski, 2003 | Parotocinclus planicauda | 57861 |
| Ancistrus planiceps Meek & Hildebrand, 1913 | Lasiancistrus caucanus | 56920 |
| Lithoxus planquettei Boeseman, 1982 | Paralithoxus planquettei | 36713 |
| Farlowella platorynchus Retzer & Page, 1997 | Farlowella platorynchus | 58032 |
| Chaetostomus platycephalus Boulenger, 1898 | Andeancistrus platycephalus | 104644 |
| Hemiodon platycephalus Kner, 1853 | Pseudohemiodon platycephalus | 36389 |
| Loricariichthys platymetopon Isbrücker & Nijssen, 1979 | Loricariichthys platymetopon | 36389 |
| Hemiancistrus platyrhynchus Fowler, 1943 | Cordylancistrus platyrhynchus | 36713 |
| Loricaria platystoma Günther, 1868 | Cteniloricaria platystoma | 36389 |
| Loricaria platyura Müller & Troschel, 1849 | Rineloricaria platyura | 36389 |
| Cochliodon plecostomoides Eigenmann, 1922 | Hypostomus plecostomoides | 6868 |
| Acipenser plecostomus Linnaeus, 1758 | Hypostomus plecostomus | 36817 |
| Plecostomus plecostomus panamensis Eigenmann, 1922 | Hypostomus aspidolepis | 36713 |
| Plecostomus plecostomus papariae Fowler, 1941 | Hypostomus papariae | 36817 |
| Farlowella pleurotaenia Miranda Ribeiro, 1939 | Farlowella amazonum | 36389 |
| Parotocinclus polyochrus Schaefer, 1988 | Parotocinclus polyochrus | 6868 |
| Otothyropsis polyodon Calegari, Lehmann A. & Reis, 2013 | Otothyropsis polyodon | 93039 |
| Plecostomus popoi Pearson, 1924 | Aphanotorulus unicolor | 129253 |
| Cochliodon pospisili (non Schultz, 1944) | Hypostomus hondae | 87757 |
| Cochliodon pospisili Schultz, 1944 | Hypostomus pospisili | 36817 |
| Hisonotus prata Carvalho & Reis, 2011 | Hisonotus prata | 86691 |
| Parotocinclus prata Ribeiro, Melo & Pereira, 2002 | Parotocinclus prata | 47265 |
| Loricaria prolixa Isbrücker & Nijssen, 1978 | Proloricaria prolixa | 58032 |
| Loricaria prolixa lentiginosa Isbrücker, 1979 | Loricaria lentiginosa | 36389 |
| Pareiorhaphis proskynita Pereira & Britto, 2012 | Pareiorhaphis proskynita | 91754 |
| Farlowella pseudogladiolus Steindachner, 1910 | Farlowella amazonum | 36389 |
| Hypostomus pseudohemiurus Boeseman, 1968 | Hypostomus pseudohemiurus | 6868 |
| Hypostomus pseudohemiurus macrophthalmus Boeseman, 1968 | Hypostomus macrophthalmus | 36817 |
| Hypoptopoma psilogaster Fowler, 1915 | Hypoptopoma psilogaster | 36885 |
| Loricaria puganensis Pearson, 1937 | Spatuloricaria puganensis | 36389 |
| Ancistrus pulcher Steindachner, 1915 | Dekeyseria pulchra | 36656 |
| Loricaria pumila Thomas & Rapp Py-Daniel, 2008 | Loricaria pumila | 79031 |
| Harttia punctata Rapp Py-Daniel & Oliveira, 2001 | Harttia punctata | 39753 |
| Loricaria punctata Kner, 1854 | Pterygoplichthys punctatus | 36817 |
| Loricaria punctata Regan, 1904 | Limatulichthys griseus | 36389 |
| Chaetostomus punctatissimus Steindachner, 1881 | Spectracanthicus punctatissimus | 36713 |
| Hypostoma punctatum Jardine, 1841 | Ancistrus dolichopterus | 36713 |
| Hypostomus punctatus Valenciennes, 1840 | Hypostomus punctatus | 6868 |
| Pterygoplichthys punctatus Günther, 1864 | Pterygoplichthys punctatus | 2060 |
| Hemiancistrus punctulatus Cardoso & Malabarba, 1999 | Hemiancistrus punctulatus | 36713 |
| Panaque purusiensis La Monte, 1935 | Panaqolus purusiensis | 36713 |
| Plecostomus pusarum Starks, 1913 | Hypostomus pusarum | 36817 |
| Cochliodon pyrineusi Miranda Ribeiro, 1920 | Hypostomus pyrineusi | 6868 |
| Rineloricaria quadrensis Reis, 1983 | Rineloricaria quadrensis | 36389 |
| Plecostomus rachovii Regan, 1913 | Hypostomus laplatae | 36817 |
| Ancistrus ranunculus Muller, Rapp Py-Daniel & Zuanon, 1994 | Ancistrus ranunculus | 36713 |
| Lithoxus raso Silva, Covain, Oliveira & Roxo, 2017 | Paralithoxus raso | 118148 |
| Hemipsilichthys regani Giltay, 1936 | Pareiorhaphis regani | 58032 |
| Plecostomus regani Ihering, 1905 | Hypostomus regani | 36817 |
| Ancistrus reisi Fisch-Muller, Cardoso, da Silva & Bertaco, 2005 | Ancistrus reisi | 54498 |
| Rineloricaria reisi Ghazzi, 2008 | Rineloricaria reisi | 75800 |
| Etsaputu relictum Lujan, Armbruster & Rengifo, 2011 | Etsaputu relictum | 88957 |
| Farlowella reticulata Boeseman, 1971 | Farlowella reticulata | 36389 |
| Pseudancistrus reus Armbruster & Taphorn, 2008 | Pseudancistrus reus | 75198 |
| Crossoloricaria rhami Isbrücker & Nijssen, 1983 | Rhadinoloricaria rhami | 6868 |
| Hypostomus rhantos Armbruster, Tansey & Lujan, 2007 | Hypostomus rhantos | 58737 |
| Harttia rhombocephala Miranda Ribeiro, 1939 | Harttia rhombocephala | 36389 |
| Neoplecostomus ribeirensis Langeani, 1990 | Neoplecostomus ribeirensis | 37046 |
| Pseudotocinclus ribeiroi Gomes, 1955 | Schizolecis guentheri | 36885 |
| Hisonotus ringueleti Aquino, Schaefer & Miquelarena, 2001 | Hisonotus ringueleti | 80996 |
| Hypostomus robertsoni Dias & Zawadzki, 2021 | Hypostomus robertsoni | 124595 |
| Hypostomus robinii Valenciennes, 1840 | Hypostomus robinii | 6868 |
| Oxyloricaria robusta Regan, 1904 | Sturisoma robustum | 36389 |
| Parotocinclus robustus Lehmann A. & Reis, 2012 | Parotocinclus robustus | 91034 |
| Farlowella roncallii Martín Salazar, 1964 | Farlowella vittata | 36389 |
| Harttia rondoni Oyakawa, Fichberg & Rapp Py-Daniel, 2018 | Harttia rondoni | 117418 |
| Plecostomus rondoni Miranda Ribeiro, 1912 | Hypostomus rondoni | 36817 |
| Neblinichthys roraima Provenzano R., Lasso A. & Ponte, 1995 | Neblinichthys roraima | 36713 |
| Pareiorhina rosai Silva, Roxo & Oyakawa, 2016 | Pareiorhina rosai | 107875 |
| Hypostomus roseopunctatus Reis, Weber & Malabarba, 1990 | Hypostomus roseopunctatus | 36817 |
| Loricaria rostrata Spix & Agassiz, 1829 | Sturisoma rostratum | 36389 |
| Loricaria rostrata van der Hoeven, 1855 | Rineloricaria caracasensis | 36389 |
| Otothyris rostrata Garavello, Britski & Schaefer, 1998 | Otothyris rostrata | 28152 |
| Loricariichthys rostratus Reis & Pereira, 2000 | Loricariichthys rostratus | 36389 |
| Xenocara rothschildi Regan, 1905 | Ancistrus gymnorhynchus | 36713 |
| Aphanotorulus rubrocauda Oliveira, Rapp Py-Daniel & Zawadzki, 2017 | Aphanotorulus rubrocauda | 129297 |
| Rhinelepis rudolphi Miranda Ribeiro, 1911 | Pareiorhina rudolphi | 36817 |
| Farlowella rugosa Boeseman, 1971 | Farlowella rugosa | 36389 |
| Pareiorhaphis ruschii Pereira, Lehmann A. & Reis, 2012 | Pareiorhaphis ruschii | 91743 |
| Curculionichthys sabaji Roxo, Silva, Ochoa & Oliveira, 2015 | Curculionichthys sabaji | 113800 |
| Peckoltia sabaji Armbruster, 2003 | Peckoltia sabaji | 77026 |
| Lasiancistrus saetiger Armbruster, 2005 | Lasiancistrus saetiger | 56920 |
| Curculionichthys sagarana Roxo, Silva, Ochoa & Oliveira, 2015 | Curculionichthys sagarana | 113800 |
| Ancistrus salgadae Fowler, 1941 | Hypostomus salgadae | 48602 |
| Rineloricaria sanga Ghazzi, 2008 | Rineloricaria sanga | 75800 |
| Cordylancistrus santarosensis Tan & Armbruster, 2012 | Transancistrus santarosensis | 104644 |
| Hypostomus saramaccensis Boeseman, 1968 | Hypostomus saramaccensis | 6868 |
| Ancistrus saudades de Souza, Taphorn & Armbruster, 2019 | Ancistrus saudades | 119730 |
| Chauliocheilos saxatilis Martins, Andrade, Rosa & Langeani, 2014 | Chauliocheilos saxatilis | 98819 |
| Isbrueckerichthys saxicola Jerep, Shibatta, Pereira & Oyakawa, 2006 | Isbrueckerichthys saxicola | 57731 |
| Curculionichthys scaius Calegari, Gamarra & Reis, 2018 | Curculionichthys scaius | 119375 |
| Ancistrus scaphirhynchus Kner, 1854 | Dekeyseria scaphirhyncha | 36713 |
| Plecostomus scaphyceps Nichols, 1919 | Hypostomus scaphyceps | 36817 |
| Panaque schaeferi Lujan, Hidalgo & Stewart, 2010 | Panaque schaeferi | 85845 |
| Rhinolekos schaeferi Martins & Langeani, 2011 | Rhinolekos schaeferi | 86681 |
| Chaetostomus schomburgkii Günther, 1864 | Lasiancistrus schomburgkii | 36713 |
| Farlowella schreitmuelleri Ahl, 1937 | Farlowella schreitmuelleri | 36389 |
| Loricaria scolopacina De Filippi, 1853 | Farlowella acus | 36389 |
| Lasiancistrus scolymus Nijssen & Isbrücker, 1985 | Lasiancistrus schomburgkii | 58032 |
| Plecostomus scopularius Cope, 1871 | Aphanotorulus horridus | 129253 |
| Liposarcus scrophus Cope, 1874 | Pterygoplichthys scrophus | 26660 |
| Hypostomus sculpodon Armbruster, 2003 | Hypostomus sculpodon | 50589 |
| Acestridium scutatum Reis & Lehmann A., 2009 | Acestridium scutatum | 82432 |
| Pareiorhaphis scutula Pereira, Vieira & Reis, 2010 | Pareiorhaphis scutula | 84022 |
| Neoplecostomus selenae Zawadzki, Pavanelli & Langeani, 2008 | Neoplecostomus selenae | 75575 |
| Plecostomus seminudus Eigenmann & Eigenmann, 1888 | Hypostomus seminudus | 36817 |
| Chaetostoma sericeum Cope, 1872 | Ancistrus sericeus | 36713 |
| Parotocinclus seridoensis Ramos, Barris-Neto, Britski & Lima, 2013 | Parotocinclus seridoensis | 94698 |
| Hypostomus serratus Valenciennes, 1840 | Pseudacanthicus serratus | 36713 |
| Rineloricaria setepovos Ghazzi, 2008 | Rineloricaria setepovos | 75800 |
| Loricaria setifera Lacepède, 1803 | Loricaria cataphracta | 36389 |
| Chaetostomus setosus Boulenger, 1887 | Dolichancistrus setosus | 36713 |
| Pseudancistrus sidereus Armbruster, 2004 | Pseudancistrus sidereus | 53269 |
| Cryptancistrus similis Fisch-Muller, Mol & Covain, 2018 | Cryptancistrus similis | 116863 |
| Loricaria simillima Regan, 1904 | Loricaria simillima | 36389 |
| Hypostomus simios Hollanda Carvalho & Weber, 2005 | Hypostomus simios | 56681 |
| Peckoltia simulata Fisch-Muller & Covain, 2012 | Peckoltia simulata | 90183 |
| Hypostomus sipaliwinii Boeseman, 1968 | Hypostomus corantijni | 90186 |
| Farlowella smithi Fowler, 1913 | Farlowella smithi | 36389 |
| Loricaria sneiderni Fowler, 1944 | Rineloricaria sneiderni | 36389 |
| Ancistrus snethlageae Steindachner, 1911 | Ancistomus snethlageae | 99824 |
| Hypostomus soniae Hollanda Carvalho & Weber, 2005 | Hypostomus soniae | 56681 |
| Otocinclus spectabilis Eigenmann, 1914 | Nannoptopoma spectabile | 116855 |
| Hemiancistrus spilomma Cardoso & Lucinda, 2003 | Ancistomus spilomma | 49598 |
| Plecostomus spilosoma Fowler, 1941 | Parotocinclus spilosoma | 36885 |
| Plecostomus spilurus Fowler, 1941 | Parotocinclus spilurus | 36885 |
| Plecostomus spiniger Hensel, 1870 | Hypostomus spiniger | 121236 |
| Loricaria spinosae Ferreira, 1922 | Pseudacanthicus histrix | 36713 |
| Hemiancistrus spinosissimus Cardoso & Lucinda, 2003 | Ancistomus spinosissimus | 49598 |
| Plecostomus spinosissimus Steindachner, 1880 | Isorineloricaria spinosissima | 9585 |
| Ancistrus spinosus Meek & Hildebrand, 1916 | Ancistrus spinosus | 36713 |
| Hypostomus spinosus Castelnau, 1855 | Pseudacanthicus spinosus | 36713 |
| Loricaria spinulifera Thomas & Rapp Py-Daniel, 2008 | Loricaria spinulifera | 79031 |
| Loricaria spixii Steindachner, 1881 | Loricariichthys castaneus | 36656 |
| Hemipsilichthys splendens Bizerril, 1995 | Pareiorhaphis splendens | 58032 |
| Chaetostoma spondylus Salcedo & Ortega, 2015 | Chaetostoma spondylus | 103265 |
| Hypostoma squalinum Jardine, 1841 | Aphanotorulus emarginatus | 129253 |
| Hypostomus squalinus Jardine, 1841 | Aphanotorulus emarginatus | 129253 |
| Chaetostoma stannii Lütken, 1874 | Chaetostoma stannii | 36713 |
| Soromonichthys stearleyi Lujan & Armbruster, 2011 | Soromonichthys stearleyi | 87303 |
| Loricaria steinbachi Regan, 1906 | Ixinandria steinbachi | 86762 |
| Hemipsilichthys steindachneri Miranda Ribeiro, 1918 | Pareiorhaphis steindachneri | 56652 |
| Hypoptopoma steindachneri Boulenger, 1895 | Hypoptopoma steindachneri | 36885 |
| Loricaria steindachneri Regan, 1904 | Rineloricaria steindachneri | 36389 |
| Parotocinclus steindachneri Di Caporiacco, 1948 | Parotocinclus maculicauda | 36885 |
| Rineloricaria stellata Ghazzi, 2008 | Rineloricaria stellata | 75800 |
| Hemipsilichthys stephanus Oliveira & Oyakawa, 1999 | Pareiorhaphis stephanus | 58032 |
| Nannoptopoma sternoptychum Schaefer, 1996 | Nannoptopoma sternoptychum | 116855 |
| Loricaria stewarti Eigenmann, 1909 | Rineloricaria stewarti | 36389 |
| Rhadinoloricaria stewarti Provenzano & Barriga Salazar, 2020 | Rhadinoloricaria stewarti | 124527 |
| Lamontichthys stibaros Isbrücker & Nijssen, 1978 | Lamontichthys stibaros | 36389 |
| Ancistrus stigmaticus Eigenmann & Eigenmann, 1889 | Ancistrus stigmaticus | 36713 |
| Lithoxus stocki Nijssen & Isbrücker, 1990 | Paralithoxus stocki | 36713 |
| Hemipsilichthys stomias Pereira & Reis, 2002 | Pareiorhaphis stomias | 42856 |
| Plecostomus strigaticeps Regan, 1908 | Hypostomus strigaticeps | 36817 |
| Loricaria strigilata Hensel, 1868 | Rineloricaria strigilata | 36389 |
| Rhinelepis strigosa Valenciennes, 1840 | Rhinelepis strigosa | 33317 |
| Chaetostoma stroumpoulos Salcedo, 2006 | Chaetostoma stroumpoulos | 57692 |
| Loricaria stuebelii Steindachner, 1882 | Loricariichthys stuebelii | 36656 |
| Hypostomus subcarinatus Castelnau, 1855 | Hypostomus subcarinatus | 6868 |
| Loricaria submarginatus Eigenmann, 1909 | Rineloricaria platyura | 36389 |
| Kronichthys subteres Miranda Ribeiro, 1908 | Kronichthys subteres | 36817 |
| Hemiancistrus subviridis Werneke, Sabaj Pérez, Lujan & Armbruster, 2005 | Hemiancistrus subviridis | 56038 |
| Harttia surinamensis Boeseman, 1971 | Harttia surinamensis | 36389 |
| Hypostomus surinamensis Boeseman, 1968 | Hypostomus surinamensis | 6868 |
| Lithoxus surinamensis Boeseman, 1982 | Paralithoxus surinamensis | 36713 |
| Panaque suttonorum Schultz, 1944 | Panaque suttonorum | 36713 |
| Chaetostoma tachiraense Schultz, 1944 | Chaetostoma tachiraense | 36713 |
| Chaetostoma taczanowskii Steindachner, 1882 | Chaetostoma taczanowskii | 36713 |
| Plecostomus taeniatus Regan, 1908 | Hypostomus laplatae | 36817 |
| Microlepidogaster taimensis Buckup, 1981 | Hisonotus taimensis | 36885 |
| Oxyloricaria tamanae Regan, 1912 | Sturisomatichthys tamanae | 36389 |
| Ancistrus tamboensis Fowler, 1945 | Ancistrus tamboensis | 36713 |
| Cochliodon taphorni Lilyestrom, 1984 | Hypostomus taphorni | 36817 |
| Farlowella taphorni Retzer & Page, 1997 | Farlowella taphorni | 28768 |
| Hypostomus tapijara Oyakawa, Akama & Zanata, 2005 | Hypostomus tapijara | 54480 |
| Otocinclus tapirape Britto & Moreira, 2002 | Otocinclus tapirape | 46820 |
| Ancistrus taunayi Miranda Ribeiro, 1918 | Ancistrus taunayi | 36713 |
| Chaetostomus tectirostris Cope, 1872 | Ancistrus hoplogenys | 36713 |
| Loricaria teffeana Steindachner, 1879 | Rineloricaria teffeana | 36389 |
| Hypostomus temminckii Valenciennes, 1840 | Ancistrus temminckii | 36713 |
| Lasiancistrus tentaculatus Armbruster, 2005 | Lasiancistrus tentaculatus | 56920 |
| Plecostomus tenuicauda Steindachner, 1878 | Isorineloricaria tenuicauda | 36817 |
| Oxyloricaria tenuirostris Steindachner, 1910 | Sturisoma tenuirostre | 36389 |
| Guyanancistrus tenuis Fisch-Muller, Mol & Covain, 2018 | Guyanancistrus tenuis | 116863 |
| Hypostomus tenuis Boeseman, 1968 | Hypostomus tenuis | 129253 |
| Guyanancistrus teretirostris Fisch-Muller, Mol & Covain, 2018 | Guyanancistrus teretirostris | 116863 |
| Plecostomus ternetzi Boulenger, 1895 | Hypostomus ternetzi | 36817 |
| Spatuloricaria terracanticum Londoño-Burbano, Urbano-Bonilla, Rojas-Molina, Ramírez-Gil & Prada-Pedreros, 2018 | Spatuloricaria terracanticum | 119417 |
| Hisonotus thayeri Martins & Langeani, 2016 | Hisonotus thayeri | 109747 |
| Chaetostoma thomsoni Regan, 1904 | Chaetostoma thomsoni | 36713 |
| Hypoptopoma thoracatum Günther, 1868 | Hypoptopoma thoracatum | 36885 |
| Hypoptopoma thoracatum (non Günther, 1868) | Hypoptopoma steindachneri | 84367 |
| Pseudohemiodon thorectes Isbrücker, 1975 | Pseudohemiodon thorectes | 36389 |
| Loricaria thrissoceps Fowler, 1943 | Rineloricaria thrissoceps | 36389 |
| Euryochus thysanos Pereira & Reis, 2017 | Euryochus thysanos | 116743 |
| Otocinclus tietensis Ihering, 1907 | Pseudotocinclus tietensis | 36885 |
| Plecostomus tietensis Ihering, 1905 | Hypostomus tietensis | 36817 |
| Lasiancistrus tigris Armbruster & Provenzano, 2000 | Pseudolithoxus tigris | 40437 |
| Panaque titan Lujan, Hidalgo & Stewart, 2010 | Panaque titan | 85845 |
| Corumbataia tocantinensis Britski, 1997 | Corumbataia tocantinensis | 36885 |
| Spectracanthicus tocantinensis Chamon & Rapp Py-Daniel, 2014 | Spectracanthicus tocantinensis | 95496 |
| Ancistrus tolima Taphorn, Armbruster, Villa-Navarro & Ray, 2013 | Ancistrus tolima | 93347 |
| Ancistrus tombador Fisch-Muller, Cardoso, da Silva & Bertaco, 2005 | Ancistrus tombador | 54498 |
| Plecostomus topavae Godoy, 1969 | Hypostomus topavae | 36817 |
| Pseudancistrus torbesensis Schultz, 1944 | Cordylancistrus torbesensis | 36713 |
| Harttia torrenticola Oyakawa, 1993 | Harttia torrenticola | 36389 |
| Otothyris travassosi Garavello, Britski & Schaefer, 1998 | Otothyris travassosi | 28152 |
| Leporacanthicus triactis Isbrücker, Nijssen & Nico, 1992 | Leporacanthicus triactis | 58310 |
| Hopliancistrus tricornis Isbrücker & Nijssen, 1989 | Hopliancistrus tricornis | 33175 |
| Chaetostoma trimaculineum Lujan, Meza-Vargas, Astudillo-Clavijo, Barriga-Salazar & López-Fernández, 2015 | Chaetostoma trimaculineum | 104727 |
| Chaetostoma trinitatis Günther, 1864 | Ancistrus trinitatis | 84081 |
| Acestridium triplax Rodríguez & Reis, 2007 | Acestridium triplax | 75792 |
| Ancistrus triradiatus Eigenmann, 1918 | Ancistrus triradiatus | 36713 |
| Ancistrus triradiatus martini Schultz, 1944 | Ancistrus martini | 36713 |
| Harttia trombetensis Rapp Py-Daniel & Oliveira, 2001 | Harttia trombetensis | 39753 |
| Rineloricaria tropeira Ghazzi, 2008 | Rineloricaria tropeira | 75800 |
| Loricaria tucumanensis Isbrücker, 1979 | Loricaria tucumanensis | 36389 |
| Spatuloricaria tuira Fichberg, Oyakawa & de Pinna, 2014 | Spatuloricaria tuira | 96500 |
| Curculionichthys tukana Roxo, Dias, Silva & Oliveira, 2017 | Curculionichthys tukana | 118146 |
| Harttia tuna Covain & Fisch-Muller, 2012 | Harttia tuna | 90209 |
| Loricaria tuyrensis Meek & Hildebrand, 1913 | Dasyloricaria tuyrensis | 26282 |
| Loricaria tuyrensis (non Meek & Hildebrand, 1913) | Dasyloricaria filamentosa | 26543 |
| Parahemiodon typus Bleeker, 1862 | Loricariichthys maculatus | 36389 |
| Harttia uatumensis Rapp Py-Daniel & Oliveira, 2001 | Harttia uatumensis | 39753 |
| Hemiancistrus ucayalensis Fowler, 1940 | Peckoltia bachi | 77026 |
| Loricariichthys ucayalensis Regan, 1913 | Loricariichthys ucayalensis | 36389 |
| Plecostomus unae Steindachner, 1878 | Hypostomus unae | 36817 |
| Chaetostomus undecimalis Steindachner, 1878 | Pterygoplichthys undecimalis | 36817 |
| Plecostomus unicolor Steindachner, 1908 | Aphanotorulus unicolor | 129253 |
| Pseudohemiodon unillano Rojas-Molina, Provenzano & Ramírez-Gil, 2019 | Pseudohemiodon unillano | 128488 |
| Loricaria uracantha Kner, 1863 | Fonchiiichthys uracanthus | 36389 |
| Loricaria uracantha rupestre Schultz, 1944 | Fonchiiichthys rupestris | 36389 |
| Hypostomus uruguayensis Reis, Weber & Malabarba, 1990 | Hypostomus uruguayensis | 36817 |
| Chaetostoma vagum Fowler, 1943 | Chaetostoma vagum | 36713 |
| Plecostomus vaillanti Steindachner, 1877 | Hypostomus vaillanti | 36817 |
| Lithogenes valencia Provenzano, Schaefer, Baskin & Royero-Leon, 2003 | Lithogenes valencia | 83588 |
| Loricaria valenciennesii Vaillant, 1880 | Rineloricaria teffeana | 36389 |
| Micracanthicus vandragti Lujan & Armbruster, 2011 | Micracanthicus vandragti | 87303 |
| Loricaria variegata Steindachner, 1879 | Crossoloricaria variegata | 26282 |
| Loricaria variegata venezuelae Schultz, 1944 | Crossoloricaria venezuelae | 26282 |
| Neoplecostomus variipictus Bizerril, 1995 | Neoplecostomus variipictus | 37046 |
| Plecostomus variipictus Ihering, 1911 | Hypostomus variipictus | 36817 |
| Plecostomus varimaculosus Fowler, 1945 | Hypostomus varimaculosus | 36817 |
| Parotocinclus variola Lehmann A., Schvambach & Reis, 2015 | Rhinotocinclus variola | 100824 |
| Chaetostomus variolus Cope, 1872 | Ancistrus variolus | 36713 |
| Plecostomus variostictus Miranda Ribeiro, 1912 | Hypostomus variostictus | 36817 |
| Liposarcus varius (non Cope, 1872) | Pterygoplichthys multiradiatus | 2059 |
| Liposarcus varius Cope, 1872 | Pterygoplichthys pardalis | 36817 |
| Chaetostoma vasquezi Lasso & Provenzano, 1998 | Chaetostoma vasquezi | 36713 |
| Corumbataia veadeiros Carvalho, 2008 | Corumbataia veadeiros | 78746 |
| Hypostomus velhochico Zawadzki, Oyakawa & Britski, 2017 | Hypostomus velhochico | 128916 |
| Corymbophanes venezuelae Schultz, 1944 | Chaetostoma venezuelae | 36713 |
| Hypostomus ventromaculatus Boeseman, 1968 | Hypostomus ventromaculatus | 6868 |
| Ancistrus verecundus Fisch-Muller, Cardoso, da Silva & Bertaco, 2005 | Ancistrus verecundus | 56914 |
| Ancistrus vericaucanus Taphorn, Armbruster, Villa-Navarro & Ray, 2013 | Ancistrus vericaucanus | 93347 |
| Plecostomus vermicularis Eigenmann & Eigenmann, 1888 | Hypostomus vermicularis | 36817 |
| Hypostomus verres Valenciennes, 1840 | Hypostomus watwata | 36817 |
| Hisonotus vespuccii Roxo, Silva & Oliveira, 2015 | Hisonotus vespuccii | 114934 |
| Hemipsilichthys vestigipinnis Pereira & Reis, 1992 | Pareiorhaphis vestigipinnis | 42856 |
| Otocinclus vestitus Cope, 1872 | Otocinclus vestitus | 36885 |
| Loricaria vetula Valenciennes, 1835 | Paraloricaria vetula | 36389 |
| Hypostomus vicinus Castelnau, 1855 | Parancistrus aurantiacus | 36713 |
| Upsilodus victori Miranda Ribeiro, 1924 | Hemipsilichthys gobio | 36817 |
| Plecostomus villarsi Lütken, 1874 | Isorineloricaria villarsi | 36817 |
| Harttia villasboas Oyakawa, Fichberg & Rapp Py-Daniel, 2018 | Harttia villasboas | 117418 |
| Lithogenes villosus Eigenmann, 1909 | Lithogenes villosus | 6868 |
| Hisonotus vireo Carvalho & Reis, 2011 | Hisonotus vireo | 86691 |
| Plecostomus virescens Cope, 1874 | Aphanotorulus horridus | 129253 |
| Farlowella vittata Myers, 1942 | Farlowella vittata | 36389 |
| Chaetostomus vittatus Steindachner, 1881 | Peckoltia vittata | 36713 |
| Otocinclus vittatus Regan, 1904 | Otocinclus vittatus | 36885 |
| Ancistrus vittatus var. vermiculatus Steindachner, 1908 | Peckoltia vermiculata | 86870 |
| Lasiancistrus volcanensis Dahl, 1942 | Lasiancistrus caucanus | 56920 |
| Hemiancistrus votouro Cardoso & da Silva, 2004 | Hemiancistrus votouro | 54753 |
| Lithogenes wahari Schaefer & Provenzano, 2008 | Lithogenes wahari | 83588 |
| Hypostomus waiampi Hollanda Carvalho & Weber, 2005 | Hypostomus waiampi | 56681 |
| Neoplecostomus watersi Silva, Reia, Zawadzki & Roxo, 2019 | Neoplecostomus watersi | 119403 |
| Hypostomus watwata Hancock, 1828 | Hypostomus watwata | 36817 |
| Hypostomus weberi Carvalho, Lima & Zawadzki, 2010 | Hypostomus weberi | 83896 |
| Pterygoplichthys weberi Armbruster & Page, 2006 | Pterygoplichthys weberi | 75871 |
| Peckoltia wernekei Armbruster & Lujan, 2016 | Peckoltia wernekei | 111081 |
| Plecostomus wertheimeri Steindachner, 1867 | Pogonopoma wertheimeri | 36817 |
| Hemiancistrus wilsoni Eigenmann, 1918 | Hypostomus wilsoni | 99824 |
| Plecostomus winzi Fowler, 1945 | Isorineloricaria tenuicauda | 129253 |
| Rineloricaria wolfei Fowler, 1940 | Rineloricaria wolfei | 36389 |
| Hopliancistrus wolverine Oliveira, Zuanon, Rapp Py-Daniel, Birindelli & Sousa, 2021 | Hopliancistrus wolverine | 125999 |
| Oxyropsis wrightiana Eigenmann & Eigenmann, 1889 | Oxyropsis wrightiana | 36885 |
| Plecostomus wuchereri Günther, 1864 | Hypostomus wuchereri | 36817 |
| Farlowella wuyjugu Dopazo, Wosiacki & Britto, 2023 | Farlowella wuyjugu | 128687 |
| Otocinclus xakriaba Schaefer, 1997 | Otocinclus xakriaba | 36885 |
| Baryancistrus xanthellus Rapp Py-Daniel, Zuanon & Ribeiro de Oliveira, 2011 | Baryancistrus xanthellus | 87296 |
| Hopliancistrus xavante Oliveira, Zuanon, Rapp Py-Daniel, Birindelli & Sousa, 2021 | Hopliancistrus xavante | 123477 |
| Hopliancistrus xikrin Oliveira, Zuanon, Rapp Py-Daniel, Birindelli & Sousa, 2021 | Hopliancistrus xikrin | 125999 |
| Glyptoperichthys xinguensis Weber, 1991 | Pterygoplichthys xinguensis | 75871 |
| Hypostomus yaku Martins, Langeani & Zawadzki, 2014 | Hypostomus yaku | 97842 |
| Neoplecostomus yapo Zawadzki, Pavanelli & Langeani, 2008 | Neoplecostomus yapo | 75575 |
| Ancistrus yaravi Steindachner, 1915 | Neblinichthys yaravi | 36713 |
| Farlowella yarigui Ballen & Mojica, 2014 | Farlowella yarigui | 94974 |
| Epactionotus yasi Almirón, Azpelicueta & Casciotta, 2004 | Epactionotus yasi | 56308 |
| Pseudancistrus yekuana Lujan, Armbruster & Sabaj Pérez, 2007 | Pseudancistrus yekuana | 58451 |
| Chaetostoma yurubiense Ceas & Page, 1996 | Chaetostoma yurubiense | 36713 |
| Ancistrus yutajae de Souza, Taphorn & Armbruster, 2019 | Ancistrus yutajae | 119730 |
| Rineloricaria zaina Ghazzi, 2008 | Rineloricaria zaina | 75800 |
| Pseudancistrus zawadzkii Silva, Roxo, Britzke & Oliveira, 2014 | Pseudancistrus zawadzkii | 95679 |
| Hypancistrus zebra Isbrücker & Nijssen, 1991 | Hypancistrus zebra | 36713 |
| Spectracanthicus zuanoni Chamon & Rapp Py-Daniel, 2014 | Spectracanthicus zuanoni | 95496 |
| Pterygoplichthys zuliaensis Weber, 1991 | Pterygoplichthys zuliaensis | 26660 |