Clupisoma longianale (Huang)

Li, Xu & Zhou, Wei, 2018, The species of Clupisoma from Yunnan, China (Teleostei: Siluriformes: Ailiidae), with a comment on the validity of the family Ailiidae, Zootaxa 4476 (1), pp. 77-86 : 78-79

Clupisoma longianale (Huang)

( Fig. 1 )

Platytropius longianalis Huang 1981: 438 , fig. 5 (Holotype: KIZ 735118, Pu-Er County, Tongxing Township); Chu & Kuang 1990: 131 (Yunxian, Xiaoganlanba in Simao County, Menghan in Jinghong County).

Clupisoma longianalis: Chen et al. 2005: 570 (Lancang Jiang) ; Ferraris 2007: 357 (Lancangjiang [= Mekong River]); Chen in Yang et al. 2010: 509 (middle and lower Lancang-jiang); Chen 2013: 318 (middle and lower Lancang-jiang); Zhang et al. 2016: 181 (middle and lower Lancang-jiang).

Clupisoma longianale: Kottelat 2013: 251 (holotype: KIZ 735118 , type locality: China: Yunnan: Simao Prefecture: Puer County: Tongxing Township , a tributary of Pu-Er River at Xiaoganlanba [ Mekong basin]).

Material examined. Holotype: KIZ 735118 , 138 mm SL; Yunnan: Pu-Er County: Tongxing Township, main stream of the Lancang-jiang . Paratype: KIZ 735125, 109.3 mm SL, collected with the holotype; KIZ 748127 , 101.8 mm SL, Yunnan: Jinghong County: Menghan Township , main stream of the Lancang-jiang.

Diagnosis. Morphometric and meristic data are shown in Tables 1 and 2. Clupisoma longianale is distinguished from its congeners occurring in China by the following combination of characters: nasal barbel extending to or almost to dorsal-fin origin vertically (vs. extending only to pectoral-fin origin); maxillary barbel extending beyond middle of anal-fin base (vs. extending only to anal-fin origin); medial mental barbel extending to 1/3–1/2 of anal-fin base (vs. not extending beyond end of pectoral-fin); origin of pelvic fin located at middle of dorsal-fin base vertically (vs. located at end of dorsal-fin base vertically).

Distribution. Lower Lancang-jiang in Yunnan, China (upper Mekong River basin) ( Fig. 2 ).

Remark. This species can be easily distinguished from its congeners by the possession of the longer nasal, maxillary, and medial mental barbels.

Figures

FIGURE 1. Clupisoma longianale, KIZ 735118, holotype, 138 mm SL; Yunnan: Pu-Er County: Tongxing Township, main stream of the Lancang-jiang, the upper Mekong River.

FIGURE 2. Map showing localities of Clupisoma longianale, C. sinense, and C. yunnanensis in Yunnan, China.