The species of Clupisoma from Yunnan, China (Teleostei: Siluriformes: Ailiidae), with a comment on the validity of the family Ailiidae Author Li, Xu Author Zhou, Wei text Zootaxa 2018 2018-09-13 4476 1 77 86 journal article 29435 10.11646/zootaxa.4476.1.7 047625bd-d780-4ec9-b46b-774d07566f94 1175-5326 1440444 E84094BF-7993-445F-8123-4C1A2EAB27BE 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. 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. 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.