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Teleostei (teleosts) > Characiformes (Characins) > Characidae (Characins; tetras) > Tetragonopterinae
Etymology: Tetragonopterus: Name from Greek words: 'Tetra' meaning four; 'gonia' meaning angle; 'pteron' for fin; referring to the evident tetragonal shape of the body (Ref. 124043); anostomus: Named for Alberto Akama in recognition of his contributions to Neotropical ichthyology and in recognition of his many collecting efforts on several South American drainages. A noun in apposition..

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; pelagic. Tropical; 14°S - 15°S, 50°W - 51°W

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South America: Brazil.

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 5 - ? cm
Max length : 12.9 cm TL male/unsexed; (Ref. 126097); max. published weight: 39.31 g (Ref. 126097)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 9; Anal soft rays: 26 - 30. This species is distinguished from all its congeners by having the following characters: a subsuperior mouth (vs. terminal mouth); differs from all congeners except T. araguaiensis by having 17-19 gill rakers on the lower limb of the first gill arch (vs. 11-14); differs from its congeners, except T. denticulatus, T. juruena, T. kuluene by bearing 5-6 principal teeth on dentary (vs. 4) and thinner and sharper teeth on dentary (vs. large and more robust teeth); differs from T. ommatus by having 2-4 teeth on maxilla (vs. 7-8) and with a mark centered on the caudal peduncle (vs. mark limited to the posterior portion of the peduncle); differs from T. carvalhoi by the presence of a rounded mark on the caudal peduncle (vs. a lozenge-shaped mark); differs from T. rarus by the absence of longitudinal dark stripes on the flank (vs. the presence of stripes); differs from T. rarus, T. georgiae by having 3.5 longitudinal scale rows between lateral line and pelvic-fin origin (vs. 4.5-5.5); differs from T. argenteus by having 8 predorsal scales (vs. 11-17) (Ref. 124043).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Silva, G.S.C., B.F. Melo, C. Oliveira and R.C. Benine, 2016. Revision of the South American genus Tetragonopterus Cuvier, 1816 (Teleostei: Characidae) with description of four new species. Zootaxa 4200(1):1-46. (Ref. 124043)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.02188 (0.00852 - 0.05619), b=3.00 (2.78 - 3.22), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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