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) > Stethaprioninae
Etymology: Deuterodon: Greek, deuter = second + Greek, odous = teeth (Ref. 45335).
More on author: Jenyns.
Etymology: Deuterodon: Greek, deuter = second + Greek, odous = teeth (Ref. 45335).
More on author: Jenyns.
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. 亞熱帶的
分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
South America: Macaé, São João, and Paraíba do Sul river basins in Rio de Janeiro State, and Benevente river basin in Espírito Santo State, Brazil. Specimens from Espírito Santo State are tentatively identified as A. taeniatus. Additional specimens are needed to further assess if the population from Epírito Santo State represents a distinct species.
南美洲: Paraiba 做 Sul 河流域與里約熱內盧與巴西的聖埃斯皮里托的沿海河川到阿根廷。 (參考文獻 9086)
南美洲: Paraiba 做 Sul 河流域與里約熱內盧與巴西的聖埃斯皮里托的沿海河川到阿根廷。 (參考文獻 9086)
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 10.7 cm SL 雄魚/尚未辨別雌雄; (Ref. 131243); 最大體重: 35.85 g (Ref. 131243)
Max length : 10.7 cm SL 雄魚/尚未辨別雌雄; (Ref. 131243); 最大體重: 35.85 g (Ref. 131243)
簡短描述 檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 1; 背的軟條 (總數) : 10 - 11; 臀棘: 3; 臀鰭軟條: 21; 脊椎骨: 37. Astyanax taeniatus is distinguished from all other species of the Astyanax by the presence of a gap between the symphyseal dentary teeth, with the exception of A. henseli. It differs from A. henseli by having only one humeral spot (vs. two), 19-23 anal-fin rays (vs. 22-27), orbital diameter 38.5-46, mean ¼ 42.2 (vs. 42.4-50.7, mean ¼ 46.7), and 12-13 gill rakers on hypobranchial (vs. 14-15). In addition, Astyanax taeniatus differs from A. henseli and most Astyanax species, except A. ribeirae, A. hastatus, A. giton, and A. bahiensis, by having a humeral spot shaped like a comma. It can be diagnosed from A. ribeirae and A. hastatus by having 38-41 scales on lateral line (vs. 34-36) and from A. giton and A. bahiensis by the format of third infraorbital (with a naked area in relation to preopercle vs. reaching preopercle, without naked area). It can be further diagnosed from morphologically similar species of the genus Astyanax that occur in Atlantic coastal river basins by having 38-41 perforated scales in the lateral line (vs. 34-38 in most of species), except A. aff. fasciatus, A. parahybae, and A. pelecus. It differs from A. aff. fasciatus, A. parahybae and A. scabripinnis by the dentary teeth decreasing abruptly after the fifth or sixth tooth (vs. dentary teeth decreasing abruptly after the fourth tooth). It can be differentiated from A. pelecus by humeral spot surpassing lateral line (vs. humeral spot restrict to the region above lateral line) (Ref. 119398).
Teeth in the lower jaw 14 or more. The ventrals are exactly aligned with the origin of the dorsal fin.
在下面的頜 14個或更多中的齒。 腹面是合併在完全的背鰭起點。
在下面的頜 14個或更多中的齒。 腹面是合併在完全的背鰭起點。
Occurs both in lotic and lentic water bodies associated with rocks and sand in the bottom. Stomach contents of 15 specimens ranging from 2.31 to 6.58 cm SL consisted predominantly of vegetal origin items (aquatic plants, filamentous algae) and in low proportion of aquatic insects (Chironomidae larvae and pupae, and Ephemeroptera). Individuals between 2.307 and 3.918 cm SL fed more on aquatic insects than algae; specimens ranging from 4.019 to 6.582 cm SL consumed more algae than aquatic insects; and the larger specimens measuring 5.37-6.582 cm SL fed exclusively on aquatic plants (Ref. 119398).
生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: Paraiba 做 Sul 河流域與里約熱內盧與巴西的聖埃斯皮里托的沿海河川到阿根廷。 (參考文獻 9086)
主要參考資料
上傳您的推薦信 | 參考文獻 | 合作者 | 合作者
Terán, G.E., M.F. Benitez and J.M. Mirande, 2020. Opening the Trojan house: phylogeny of Astyanax, two genera and resurrection of Psalidodon (Teleostei: Characidae). Zool. J. Lin. Soc. 190(4):1217-1234. (Ref. 123753)
CITES
Not Evaluated
對人類具威脅
無害處的
人類使用
漁業: 沒有興趣
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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]. |
| Bayesian length-weight | a=0.00575 (0.00222 - 0.01491), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
營養階層 (參考文獻 69278) |
3.2 ±0.5 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 vulnerability (23 of 100). 🛈 |