分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (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: Name from Greek ano-, meaning upward, above; and stoma, meaning mouth, referring to the position of the mouth.
Environment: milieu / climate zone / 深度上下限 / distribution range
生態學
; 淡水 大洋性. ; 14°S - 15°S, 50°W - 51°W
分布
國家 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
South America: Brazil.
Length at first maturity / 大小 / 重量 / 年齡
成熟度: Lm ?, range 5 - ? cm
Max length : 12.9 cm TL 雄魚/尚未辨別雌雄; (Ref. 126097); 最大體重: 39.31 g (Ref. 126097)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 9; 臀鰭軟條: 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).
Cross section: compressed.
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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 瀕危狀態 (Ref. 130435: Version 2025-1)
無危 (LC) ; Date assessed: 07 November 2018
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Estimates based on models
Phylogenetic diversity index (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02399 (0.01219 - 0.04721), b=2.89 (2.72 - 3.06), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.6 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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