Classification / Names
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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); kuluene: Named for Rio Culuene (indigenous spelling), the type locality of this new speciesl; nun in apposition.
Environment: milieu / climate zone / distribuzione batimetrica / distribution range
Ecologia
; acqua dolce pelagico. Tropical
South America: Brazil.
Size / Peso / Age
Maturità: Lm ? range ? - ? cm
Max length : 6.4 cm SL maschio/sesso non determinato; (Ref. 124043)
Short description
Chiavi di identificazione | Morfologia | Morfometria
Raggi dorsali molli (totale) : 9; Raggi anali molli: 26 - 30; Vertebre: 30 - 31. This species is distinguished from its congeners, except T. anostomus, by having only 1 (vs. 2) conspicuous humeral mark; differs from T. anostomus by having a terminal mouth (vs. subsuperior mouth); differs from T. anostomus, T. araguaiensis by the number of gill rakers of the first gill arch, lower 12-13 and upper 8-9, limbs (vs. 17-20 and 10-12 respectively); differs from all congeners, except T. anostomus, T. denticulatus, T. juruena, by having principal dentary teeth 5-6 (vs. 4) and with thinner and sharper teeth (vs. more robust teeth); differs from T. denticulatus by the numbe of scale rows between lateral line and dorsal-fin origin 6 (vs. 7); differs from T. argenteus by the number of predorsal scales 8 (vs. 11-17); differs from T. carvalhoi by the presence of a rounded dark mark on the caudal peduncle (vs. a lozenge-shaped dark mark); differs from T. rarus by the absence of dark longitudinal stripes on the trunk (vs. presence); differs from T. georgiae, T. rarus by the scale rows between lateral line and pelvic-fin origin 3.5 (vs. 4.5-5.5); differs from T. ommatus by the number of maxillary teeth 2-5 (vs. 8-7) and by having the mark centered on caudal peduncle (vs. mark limited to posterior portion of caudal peduncle) (Ref. 124043).
Cross section: compressed.
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
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: Version 2025-1)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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Estimates based on models
Phylogenetic diversity index (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02951 (0.01224 - 0.07115), b=2.91 (2.71 - 3.11), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (Fonte Biblio.
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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