Mekong bachcha

diagnosis

Diagnosis. Morphometric and meristic data are shown in Tables 1 and 2. Clupisoma sinense is distinguished from its congeners occurring in China by the following combination of characters: branched anal-fin rays 40 – 43 (vs. more than 47); dorsal-fin origin located at vertical through middle distance between pectoral-fin origin and pelvic-fin origin (vs. behind middle distance between pectoral-fin origin and pelvic-fin origin, or close to pelvic-fin origin); pectoral-fin spine not extending to pelvic-fin origin (vs. extending to or beyond pelvic-fin origin).

The species of Clupisoma from Yunnan, China (Teleostei: Siluriformes: Ailiidae), with a comment on the validity of the family Ailiidae

distribution

Distribution. Lower Lancang-jiang in Yunnan, China (upper Mekong River basin) (Fig. 2); Mekong River basin in Laos (Kottelat 2001), Thailand, and Cambodia; and the Malay Peninsula (Zakaria-Ismail 1992, Rainboth 1996, Ng 1999).

The species of Clupisoma from Yunnan, China (Teleostei: Siluriformes: Ailiidae), with a comment on the validity of the family Ailiidae

materials_examined

Material examined. Holotype: KIZ 735124, 110.1 mm SL, Yunnan: Pu-Er County: Tongxing Township, main stream of the Lancang-jiang. Paratypes: KIZ 735114 – 116, 3 ex., 164.3 – 175.4 mm SL, collected with the holotype; KIZ 735044, 734056, 2 ex., 146.7 – 200 mm SL, Yunnan: Jinghong County: Menghan Township, main stream of the Lancang-jiang; KIZ 737005, 1 ex., 187.7 mm SL, Yunnan: Lcncang County: Menglang; KIZ 75001, 764001, 2 ex., 219.8 mm SL and 254.4 mm SL, Yunnan: Shuangjiang County: Xiaoheijiang, a branch of Lancang-jiang; KIZ 7890578, 1 ex., 205.7 mm SL, Yunnan: Mengla County: Menglun Township, a branch of Lancang-jiang.

The species of Clupisoma from Yunnan, China (Teleostei: Siluriformes: Ailiidae), with a comment on the validity of the family Ailiidae