分类 / 名称
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Teleostei >
Cypriniformes (Carps) >
Gastromyzontidae (Hillstream loaches)
Etymology: elongata: Specific name from the Latin elongatus which means elongate.
Eponymy: Lieutenant-Colonel Robert Beresford Seymour Sewell CIE. [...] (Ref. 128868), visit book page.
More on author: Roberts.
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. 熱帶
Asia: Se Kong of the Mekong basin.
亞洲: 湄公河流域的 Se Kong。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 7.3 cm SL 雄鱼/尚未辨别雌雄; (Ref. 38650)
简单描述
检索表 | 型态特徵 | 形态测量图
脊椎骨: 35 - 37. The following combination of characters distinguished this species from its congeners: body without dark stripes; paired fins with no concentric bands; pelvic fin reaching beyond anus; general appearance elongated; body width at the origin of dorsal fin 20.7-24.4% SL; caudal peduncle depth 8.0-9.6 % SL; caudal peduncle length 1.0-1.2 times in its depth; predorsal length 46.5-49.5% SL; pelvic-fin origin in front of dorsal-fin origin; absence of cavity around mouth; skin-fold between oropectoral membrane and ventral surface of head running from pectoral-fin origin to second rostral barbel; tubercles on top of head concentrated on lateral parts of snout; absence of large tubercles on branched pectoral-fin rays 15-21; and 65-70 lateral line scales. Very dark, almost black when alive; color pattern changes after preservation (Ref. 40433).
Body shape (shape guide): elongated.
头部与身体多更细长与比较不结实超过在 S. diardi 中. 颜色相当微暗的与单色的, 难以名状相较于其他的 Sewellia了. 偶鳍具有一个细的灰白边缘, 不一样地模糊有斑点。 胸鳍分支条 22-24; 腹鳍分支条 20. 身体的肛门后部分相当延长或细长的, 它的深度大约 8-9 倍进入标准的长度之内.(对其他的种的 6-7) 脊椎骨通常众多的超过在任何其他的种方面,35-37.(参考文献 38650) 在腹鳍起点 4.0-4.3 标准体长比率的身体宽度; 尾柄深度大约 8-9 标准体长比率.(参考文献 43281)
Occurs in moderately high gradient forested montane stream with large boulders, a coarse gravel or sandy bottom and some logs. Also found in an extremely high gradient, tumultuous mountain stream with huge boulders and coarse gravel bottom.
用大圆石, 一个粗砾石或沙质底部与一些圆木出现于一般高落差的山区森林水流。 用极大的大圆石与粗砾石底部也发现于一个非常高落差又吵闹的山地溪流。
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: 湄公河流域的 Se Kong。
Roberts, T.R., 1998. Systematic revision of the balitorid loach genus Sewellia of Vietnam and Laos, with diagnoses of four new species. Raffles Bull. Zool. 46(2):271-288. (Ref. 38650)
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): PD
50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00285 - 0.01461), b=3.11 (2.91 - 3.31), 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): 3.6 ±0.4 se; based on size and trophs of closest relatives
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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