Pareuchiloglanis kamengensis
Creators: name: Xu Li
name: Wei Zhou
name: Alfred W. Thomson
name: Qing Zhang
name: Ying Yang
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Siluriformes
Sisoridae
Pareuchiloglanis
Pareuchiloglanis kamengensis

description: Pareuchiloglanis kamengensis
(Fig. 6)
Euchiloglanis kamengensis Chu, 1979: 77 (Lancangjiang drainage); Wu et al, 1981: 77 (Lancangjiang drainage).
Pareuchiloglanis kamengensis: Chu, 1986: 41 (Lancangjiang drainage); Chu et al., 1990: 205 (Lancangjiang drainage); Wu & Wu, 1992: 552-554 (Lancangjiang drainage); Chen, 1998: 305-306 (Lancangjiang drainage); Chu & Mo 1999: 169 (Lancangjiang drainage).
Material examined. All examined specimens are from the upper Lancangjiang, Yunnan, China. SWFC 0411001-0411018 (18; 69.5-157.1 mm SL), Yingpan, Lanping County. SWFC 0409001-0409012 (12; 105.0- 155.6 mm SL), Yingpan, Lanping County. SWFC 0304001-0304002 (2; 154.5-177.4 mm SL), Tongdianhe, Lanping County.
Diagnosis. Characters distinguishing Pareuchiloglanis kamengensis from P. abbreviatus, P. gracilicaudata, P. myzostoma and P. prolixdorsalis are summarized in Table 1. Morphometric and meristic data are in Table 2. A species of Pareuchiloglanis with the following unique combination of characters: adipose-fin base not confluent with caudal fin (vs. confluent); premaxillary tooth patches appear separate (vs. joined with small median indention); lower lip not connected to base of maxillary barbel by skin flap, with sulcus between them (vs. connected, and without sulcus); 7 upper + 8 lower branched caudal-fin rays (vs. 6+7); dorsal fin i-5 (vs. i- 7); anal fin ii-3-4 (vs. ii-8); distance between pelvic-fin origin to anal-fin origin shorter than distance between pelvic-fin origin to mouth (vs. equal); pectoral fin extending beyond origin of pelvic fin (vs. not reaching); origin of pelvic fins opposite end of dorsal-fin base (vs. posterior to end of dorsal-fin base); anus nearer to anal-fin origin than to end of pelvic-fin base (vs. nearer to posterior end of pelvic-fin base); anal-fin origin nearer to caudal-fin base than to posterior end of pelvic-fin base (vs. nearer to end of pelvic-fin base).
Pareuchiloglanis kamengensis is distinguished from P. abbreviatus, P. anteanalis, P. gracilicaudata, P. myzostoma, P. nebulifer, P. robusta, P. macrotrema, P. prolixdorsalis, P. sinensis, P. sichuanensis, P. tianquanensis, P. rhabdurus, P. poilanei, P. longicauda and P. nebulifer by the following characters: two isolated premaxillary tooth patches (vs. premaxillary tooth patches appearing joined with a median indentation) (Fig. 2B); lower lip not connected to base of maxillary barbel by skin flap, with sulcus between them (vs. connected, without sulcus) (Fig. 3B). It differs from P. gracilicaudata, P. gongshanensis, P. longicauda, P. macrotrema, P. myzostoma, P. robusta and P. sinensis by having longer pectoral fin, extending beyond origin of pelvic fin (vs. not reaching). It differs from P. feae, P. poilanei, P. sichuanensis and P. tianquanensis by adipose-fin base not confluent with caudal fin (vs. confluent). It differs from P. abbreviatus and P. prolixdorsalis by having 7+8 branched caudal-fin rays (vs. 6+7). It differs from P. songmaensis by having fewer fin rays, dorsal fin i-5, anal fin ii-3-4 (vs. i-7, ii-8). It differs from P. longicauda and P. sinensis by having origin of pelvic fin opposite end of dorsal-fin base (vs. posterior to end of dorsal-fin base), and differs from P. songdaensis by having distance between pelvic-fin origin to anal-fin origin shorter than distance between pelvic-fin origin to mouth (vs. equal). It differs from P. abbreviatus, P. anteanalis, P. feae, P. longicauda, P. nebulifer, P. prolixdorsalis and P. rhabdurus by having anus nearer to anal-fin origin (vs. nearer to posterior end of pelvic-fin base) and differs from P. rhabdurus by its deeper caudal peduncle, 6.5-8.9% SL (vs. 4.2% SL).
Distribution. Known from the upper Lancangjiang [Mekong] and Brahmaputra drainages (Fig. 4).
Remarks. Ng (2004) postulated that P. kamengensis recorded in the Lancangjiang by Chu & Mo (1999) could be P. macropterus Ng, and that P. kamengensis is distributed only in Brahmaputra. However, the specimens of Pareuchiloglanis from the Lancangjiang are distinguished from P. macropterus by having a pectoral fin that reaches the origin of the pelvic fin (vs. not reaching), and no pale patches on the body (vs. presence). Based on the taxonomic study results of Chu & Mo (1999), specimens of Pareuchiloglanis from Lancangjiang are most similar to those of P. kamengensis. In the absence of sufficient evidence, the authors provisionally identify these specimens as P. kamengensis.
description: Published as part of Xu Li, Wei Zhou, Alfred W. Thomson, Qing Zhang & Ying Yang, 2007, A review of the genus Pareuchiloglanis (Sisoridae) from the Lancangjiang (upper Mekong River) with descriptions of two new species from Yunnan, China., pp. 1-19 in Zootaxa 1440 on pages 12-13