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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).
More on authors: Spix & Agassiz.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Tầng nổi; pH range: 5.0 - 7.5; dH range: ? - 20. Tropical; 20°C - 28°C (Ref. 1672)
South America: Amazon basin (including rio Tocantins), Orinoco and the Atlantic drainages of the Guianas (Essequibo, Corantijn and Marowijne river basins).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 12.7 cm TL con đực/không giới tính; (Ref. 111518); Khối lượng cực đại được công bố: 40.20 g (Ref. 111518)
Short description
Hình thái học | Sinh trắc học
Các vây lưng mềm (tổng cộng): 9; Tia mềm vây hậu môn: 26 - 33; Động vật có xương sống: 30 - 31. This species is distinguished from T. anostomus, T. denticulatus, T. juruena, T. kuluene by the principal teeth on dentary 4 (vs. 5-6), and having larger and more robust teeth (vs. thinner and sharper teeth); differs from T. anostomus, T. araguaiensis by the gill-rakers on lower limb of the first gill arch 11-14 (vs. 17-20); differs from T. carvalhoi by the rounded dark mark on the caudal peduncle (vs. lozenge-shaped); differs from T. anostomus by having a terminal mouth (vs. subsuperior); differs from T. anostomus, T. kuluene by the conspicuous humeral marks 2 (vs. 1); differs from T. argenteus by the predorsal scales 7-9 (vs. 11-17); differs from T. franciscoensis by the number of olfactory lamellae 20-40 (vs. 11-17) and by having more robust teeth on dentary (vs. thinner and sharper teeth); differs from T. denticulatus by having humeral marks separated by a single vertical scale row (vs. marks separated by three vertical scale rows); differs from T. rarus by lacking the longitudinal dark stripes on the trunk (vs. presence); differs from T. rarus, T. georgiae by the scale rows between lateral line and pelvic fin origin 3.5 (vs. 4.5-5.5); differs from T. ommatus by the teeth on the maxilla 1-4 (vs. 7-8) and by having a conspicuous dark mark on the caudal peduncle (vs. inconspicuous and limited to the posterior part of the caudal peduncle) (Ref. 124043)
Occurs in creeks with rapidly flowing water over sandy areas and slow flowing water over plant debris (Ref. 12225).
Life cycle and mating behavior
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
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)
Threat to humans
Harmless
Human uses
Bể nuôi cá: Tính thương mại
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02455 (0.01299 - 0.04638), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): Chiêù cao, thời gian nhân đôi của chủng quần tối thiểu là dưới 15 tháng (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
