分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Psalidodon: Greek, psalis, -idos = scissors + Greek, odous = teeth (Ref. 45335); dissimilis: From the Latin 'dissimile' meaning not similar, in allusion to the differences of this species in relation to its congeners.
環境: 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 底中水層性.
分布
領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
South America: widespread in Iguaçu basin, Brazil.
大小 / 重量 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 13.6 cm SL 雄魚/尚未辨別雌雄; (Ref. 85756)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 8 - 9; 臀鰭軟條: 16 - 21. This species is distinguished from all its congeners from the Iguaçu basin by the following set of characters: infraorbital 3 not in contact with pre-opercle, leaving a naked area corresponding to approximately 1/5-1/4 the height of infraorbital 3; premaxillary external series with 2-5, usually 4 tricuspid teeth; non-symphysal teeth in premaxillary internal series with 5 cusps forming an arch in ventral view; maxillary with 0-3, usually 1 tooth; faint, narrow and elongate vertical humeral bar present (Ref. 85756).
Body shape (shape guide): fusiform / normal.
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Garavello, J.C.I. and F.A.A. Sampaio, 2010. Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguaçu, Paraná, Brazil (Ostariophysi, Characiformes, Characidae). Brazilian Journal of Biology 70(3):847-865. (Ref. 85756)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 07 November 2018
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基於模型的估計
系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01259 (0.00732 - 0.02164), b=3.15 (3.01 - 3.29), 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) |
3.0 ±0.3 se; based on size and trophs of closest relatives |
回復力 (參考文獻 120179) |
高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.). |
釣魚的脆弱性 (Ref. 59153) |
Low to moderate vulnerability (27 of 100). 🛈 |