Pareuchiloglanis kamengensis

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., Zootaxa 1440, pp. 1-19: 12-13

publication ID

z01440p001

publication LSID

lsid:zoobank.org:pub:2CA64B1F-8098-49A6-923E-E61CE81E4FFB

persistent identifier

http://treatment.plazi.org/id/2B0A9DAB-2760-379B-A7D1-25FDE1BDBEA0

treatment provided by

Thomas

scientific name

Pareuchiloglanis kamengensis
status

 

Pareuchiloglanis kamengensis 

(Fig. 6)

Euchiloglanis kamengensis Chu, 1979:  ZBK  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  ZBK  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  ZBK  , P. gracilicaudata  , P. myzostoma  , P. nebulifer  ZBK  , P. robusta  ZBK  , P. macrotrema  , P. prolixdorsalis  , P. sinensis  , P. sichuanensis  ZBK  , P. tianquanensis  , P. rhabdurus  ZBK  , P. poilanei  ZBK  , P. longicauda  and P. nebulifer  ZBK  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  ZBK  , P. longicauda  , P. macrotrema  , P. myzostoma  , P. robusta  ZBK  and P. sinensis  by having longer pectoral fin, extending beyond origin of pelvic fin (vs. not reaching). It differs from P. feae  , P. poilanei  ZBK  , P. sichuanensis  ZBK  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  ZBK  , P. feae  , P. longicauda  , P. nebulifer  ZBK  , P. prolixdorsalis  and P. rhabdurus  ZBK  by having anus nearer to anal-fin origin (vs. nearer to posterior end of pelvic-fin base) and differs from P. rhabdurus  ZBK  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  ZBK  , and that P. kamengensis  is distributed only in Brahmaputra. However, the specimens of Pareuchiloglanis  ZBK  from the Lancangjiang are distinguished from P. macropterus  ZBK  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  ZBK  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  .