Tyttocharax metae Román-Valencia, García-Alzate, Ruiz-C. & Taphorn, 2012
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Characiformes (Characins) > Stevardiidae (Stevardiids) > Xenurobryconinae
Etymology: metae: Specific name refers to the Meta State in eastern Colombia, where the new species was collected.
Eponymy: This is a toponym; generally referring to the Río Meta in the Colombian and Venezuelan Orinoco River system. In the case of the Tyttocharax it refers to Meta State, eastern Colombia. (Ref. 128868), visit book page.
Etymology: metae: Specific name refers to the Meta State in eastern Colombia, where the new species was collected.
Eponymy: This is a toponym; generally referring to the Río Meta in the Colombian and Venezuelan Orinoco River system. In the case of the Tyttocharax it refers to Meta State, eastern Colombia. (Ref. 128868), visit book page.
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
; 淡水 居于水底的; pH range: 7.1 - 7.6; 深度上下限 0 - 3 m (Ref. 91745).
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: Río Güejar system in Meta State, La Macarena Mountains, Orinoco basin, Colombia.
大小 / 重量 / 年龄
简单描述 检索表 | 型态特徵 | 形态测量图
脊椎骨: 40 - 41. Diagnosed from other species of the genus Tyttocharax by the presence of bony hooks on the pectoral and caudal-fin rays (vs. absence). Differs from Tyttocharax madeirae and Tyttocharax cochui by the absence of adipose fin (vs. presence), in having larger bony hooks on the anal fin than on the rays of the pelvic fins (vs. bony hooks of the same size on the rays of those fins). Can be separated from Tyttocharax cochui in having i,5-6 pectoral-fin rays (vs. i,7); from Tyttocharax tambopatensis by absence of a sexually dimorphic color pattern in life (vs. presence of sexually dimorphic color pattern,
males have bright orange abdomens), by having 4 scales rows between anal-fin origin and lateral line (vs. 6), by the 4 scale rows between pelvic-fin and lateral line (vs. 6), by the number of 5-6 branched pectoral-fin rays (vs. 7); by iii unbranched dorsal-fin rays (vs. ii) and distance between the dorsal and anal-fin origins, 22.3% to 32.2% SL (vs. 38.0-41.0% SL) (Ref. 91745).
Found in streams characterized by relatively rapid water current, running over rocky and sandy bottoms at altitudes between 264- 282 m a.s.l., high dissolved oxygen (5.7-7.1 mg/l) and having tea colored water with usually high transparency (Ref. 91745).
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
主要参考文献
上传您的参考资料 | 参考文献 | 合作者 | 合作者
Román-Valencia, C., C.A. García-Alzate, R.I. Ruiz-C. and D.C.B. Taphorn, 2012. A new species of Tyttocharax (Characiformes: Characidae: Stevardiinae) from the Güejar River, Orinoco River Basin, Colombia. Neotrop. Ichthyol. 10(3):519-525. (Ref. 91745)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
易受伤害 (VU) (B2ab(iii)); Date assessed: 12 October 2020
CITES
Not Evaluated
对人类的威胁
人类利用
渔业: 没有兴趣
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营养生态学
食物（猎物）
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基于模型的估算
系统发育多样性指数 (参考文献 82804): PD50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
营养阶层 (参考文献 69278): 3.0 ±0.4 se; based on size and trophs of closest relatives