分类 / 名称
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Teleostei >
Cypriniformes (Carps) >
Cyprinidae (Minnows or carps) > Acrossocheilinae
Etymology: Acrossocheilus: Greek, akro = topmost, summit + Greek, krossos = tassel, fringe (Ref. 45335); xamensis: Named for its type locality, Nam Xam.
More on author: Kottelat.
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 底中水层性. 熱帶
Asia: Nam Xam basin, Laos. Expected to occur in Viet Nam (Ref. 44416). Reported from Yunnan, China (Ref. 57459).
亞洲: Nam Xam 流域,寮國。 預期出現出現在越南。
大小 / 重量 / 年龄
成熟度: Lm ?  range ? - ? cm
Max length : 23.5 cm SL 雄鱼/尚未辨别雌雄; (Ref. 57459)
简单描述
检索表 | 型态特徵 | 形态测量图
Distinguished from all species of the genus known from Vietnam, Laos and southern China (Yunnan, Guangdong, Hainan) by the following combination of characters: number of lateral line scales; number of scales between dorsal-fin origin and belly; lower lip with a broad interruption, greater than half of mouth width; horny sheath on lower jaw sharp, broad, almost straight anteriorly; last simple dorsal-fin ray bony, strong, with 20 serrae along posterior margin (Ref. 36949). Body with a faint stripe and a dark blotch at caudal base; 33-35 scales along lateral line, 2 on the caudal fin (Ref. 43281).
在组合特徵之后与已知来自越南,老挝与中国南部 (云南,广东海南) 的本属的所有种区分了藉由: 侧线鳞片的数字; 在背鳍起点与腹面之间的鳞片的数字; 下唇具有一个宽的中断,大于一半的嘴宽度; 在下颌上的角的鞘锐利的,宽的, 几乎笔直地前面; 最后的单一背鳍鳍条多骨的,强的, 与 20个锯齿沿着后缘.(参考文献 36949) 在尾部的基底身体有一条模糊的斑纹与一个黑色斑块; 33-35个鳞片沿着侧线,2 在尾鳍上.(参考文献 43281)
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
亞洲: Nam Xam 流域,寮國。 預期出現出現在越南。
Kottelat, M., 2000. Diagnosis of a new genus and 64 new species of fishes from Laos (Teleostei: Cyprinidae, Balitoridae, Bagridae, Syngnathidae, Chaudhuriidae and Tetraodontidae). J. South Asian Nat. Hist. 5(1):37-82. (Ref. 36949)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
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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 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00676 (0.00306 - 0.01496), b=3.11 (2.92 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
营养阶层 (参考文献 69278) |
2.7 ±0.3 se; based on size and trophs of closest relatives |
回复力 (参考文献 120179) |
中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.). |
渔业脆弱性 (Ref. 59153) |
Moderate vulnerability (36 of 100). 🛈 |