Классификация / 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); araguaiensis: The specific name araguaiensis is in reference to the major drainage of the type-locality, the Rio Araguaia, a large tributary of the Amazon basin, central Brazil.
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный пелагический. Tropical
South America: middle portion of the Rio Araguaia in Brazil.
Size / Вес / Возраст
Maturity: Lm ? range ? - ? cm
Max length : 6.3 cm SL самец/пол неопределен; (Ref. 93280)
членистые (мягкие) лучи спинного плавника (общее число) : 9; членистые (мягкие) лучи анального плавника: 37 - 40. This species is distinguished from its congeners except Tetragonopterus anostomus by the number of gill rakers on the upper and lower limbs of the first gill arch, 10-12 and 18-20, respectively (vs. 8-10 and 12-14); differs from T. anostomus by the terminal mouth (vs. subsuperior); differs from T. anostomus, T. kuluene, T. juruena, T. denticulatus in the number of principal teeth in the dentary 4 (vs. 5-6) and also by having larger and more robust teeth (vs. thinner and sharper teeth); differs from T. argenteus by the number of predorsal scales 7-9 (vs. 111-17); differs from T. carvalhoi by having a spot on the caudal peduncle that is round (vs. lozenge-shaped spot); differs from T. ommatus by the teeth on the maxilla 0-2 (vs. 7-8) and having a centered mark on the caudal peduncle (vs. limited to the posterior portion of the caudal peduncle); 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. rarus by the lack of dark stripes on the lateral surface of the body (vs. the presence of such stripes) (Ref. 124043).
Life cycle and mating behavior
половая зрелость | размножение | нерест | икра | Fecundity | личинки
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)
Статус Красного Списка МСОП (Ref. 130435: Version 2024-1)
Угроза для людей
Harmless
Использование человеком
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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=0.02951 (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 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref.
120179): высокий, минимальное время удвоения популяции до 15 месяцев (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
