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> 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); franciscoensis: Named for the Rio São Francisco, where the species is well known and abundant; an adjective..

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

; zoet water demersaal. Tropical

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South America: Brazil.

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 11.7 cm SL mannelijk / geslacht onbekend; (Ref. 130067); max. gepubliceerd gewicht: 55.00 g (Ref. )

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Dorsale zachte stralen (totaal) : 9; Anale zachte stralen: 27 - 32; Wervels: 30. This species is distinguished from its congeners, except T. anostomus, by the following characters: olfactory lamellae 11-17 (vs. 20-41); differs from T. anostomus, T. araguaiensis with gill rakers on lower limb 11-14 (vs. 17-20); differs from T. anostomus, T kuluene by having 2 distinct humeral marks (vs. 1); differs from T. ommatus by having maxillary teeth 1-4 (vs. 7-8) and by having a mark centered on the caudal peduncle (vs. mark on the posterior portion of the caudal peduncle); differs from T. rarus without dark stripes on the flank (vs. present); differs from T. georgiae, T. rarus by having 3.5 scale rows between lateral line and pelvic-fin origin (vs. 4.5-5.5); differs from T. argenteus by predorsal scales 7-9 (vs. 11-17); differs from T. denticulatus by having humeral marks separated by only one vertical scale row (vs. humeral marks separated by three vertical scale rows). differs from T. chalceus by dentary having thinner and sharper principal teeth (vs. more robust teeth) (Ref. 124043).

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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)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Niet bedreigd (LC) ; Date assessed: 30 October 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = No PD50 data [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).

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

Weerstandsvermogen (Ref. 120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).

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

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Tetragonopterus franciscoensis Silva, Melo, Oliveira & Benine, 2016