Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Characiformes
(Characins) > Characidae
(Characins) > Tetragonopterinae
Etymology: Tetragonopterus: Greek, tetra = four + Greek, gonia = angle + Greek, pteron = wing, fin (Ref. 45335); anostomus: The specific epithet is a compound name derived from Greek ano-, meaning upward, above; and stoma, meaning mouth, in reference to the position of the mouth (Ref. 87186).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; pelagic. Tropical; 14°S - 15°S, 50°W - 51°W
South America: Brazil. Known from the type locality, rio Preto, State of Goiás, Nova Crixás, and lagoa marginal at the municipality of Cocalinho, Mato Grosso, rio Araguaia basin, central Brazil (Ref. 87186).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 5.8 cm SL male/unsexed; (Ref. 96868)
Morphology | Morphometrics
Tetragonopterus anostomus is distinguished from congeners by having a superior mouth (vs. terminal mouth) with relatively smaller and numerous teeth in the inner row of premaxilla (5–7 vs. always 5, respectively) and dentary (5 vs. 4, respectively), and by the number of gill rakers on the lower limb (18–19 vs. 12–14 respectively) of the first branchial arch. Additionally, T. anostomus is distinguished from congeners by having a comparatively enlarged maxilla. Tetragonopterus anostomus is also distinguished from T. argenteus by the number of predorsal scales (8 vs. 12–17, respectively); from T. rarus by the absence of dark stripes on the lateral surface of the body (vs. presence), and from T. carvalhoi by having a rounded spot vs. a lozenge-shaped spot on caudal peduncle (Ref. 87186).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Silva, G.S.C. and R.C. Benine, 2011. A new species of Tetragonopterus Cuvier, 1816 (Characiformes, Characidae, Tetragonopterinae) from the upper rio Araguaia, Central Brazil. Zootaxa 2911:50-56 (Ref. 87186)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months ().
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .