Clupisoma sinense (Huang)

(Fig. 3)

Platytropius sinensis Huang 1981: 437, fig. 1 (Holotype: KIZ 735124, China: Yunnan: Puer County: Xiaoganlanba); Chu & Kuang 1990: 129 (Shuanjiang County: Xiaoheijiang; Simao County: Xiaoganlanba; Lancang County: Menglang; Jinghong County: Menghan).

Laides sinensis: Rainboth 1996: 152 (mainstem of the Mekong, Cambodia).

Clupisoma sinensis: Ng 1999: 384; Chen et al. 2005: 570 (Lancang Jiang); Chen in Yang et al. 2010: 509 (middle and lower Lancang-jiang).

Clupisoma sinense: Ferraris 2007: 357 (Mekong River basin, including Lancangjiang (= upper Mekong River of Yunnan) and Malay Peninsula); Kottelat 2013: 252; Chen 2013: 318 (middle and lower Lancang-jiang); Zhang et al. 2016: 181 (lower Lancang-jiang).

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.

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).

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).