Pareuchiloglanis Pellegrin

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 : 1-2

[[ Genus Pareuchiloglanis Pellegrin ]]

Three species of Pareuchiloglanis have been recorded in the Mekong River: P. kamengensis , P. myzostoma and P. gracilicaudata (Chu 1979; Wu & Chen 1979; Chu et al. 1990; Chu & Mo 1999; Ng & Kottelat 2000; Thomson & Page 2006). Ding (2003) reported that P. feae was also distributed in the Lancangjiang drainage, but this was not based on specimens. This species has also been reported from the Irrawaddy drainage (Chu et al. 1990; Chu & Mo 1999), but Ng (2004) reported that the material identified by Chu et al. (1990) is characterized by distinctly separate (vs. confluent) adipose and caudal fins and therefore does not appear to be P. feae . Ng (2004) suggested that specimens of P. kamengensis recorded from the Mekong River drainage might be P. macropterus , a species known from the Nujiang (upper Salween River), but he noted that the identity needs to be verified.

The sisorid catfish genus Pareuchiloglanis Pellegrin (1936) belongs to the subfamily Glyptosterninae, and the tribe Glyptosternina, a group distinguished from other sisorid catfishes by the combination of no adhesive apparatus on the thorax and the presence of plaited adhesive organs on the paired-fins. The genus is diagnosed from other genera in the subfamily by the following unique combination of characters: an interrupted post-labial groove, the gill openings not extending onto the venter, homodont dentition characterized by pointed teeth in both jaws, and the tooth band in the upper jaw not produced posteriorly at the sides (Pellegrin 1936; Chu 1981; Thomson & Page 2006). A total of eighteen species are recognized: P. anteanalis , P. feae , P. gongshanensis , P. gracilicaudata , P. kamengensis , P. longicauda , P. macropterus , P. macrotrema , P. myzostoma , P. nebulifer , P. poilanei , P. rhabdurus , P. robusta , P. sichuanensis , P. sinensis , P. songdaensis , P. songmaensis and P. tianquanensis (Thomson & Page 2006).

Three described species of Pareuchiloglanis are known in the Lancangjiang drainage: P. gracilicaudata , P. kamengensis , and P. myzostoma . After examining specimens referable to Pareuchiloglanis collected from the Lancangjiang drainage, some specimens were found to belong to two undescribed species. This prompted the authors to compare all materials known from the area with all nominal species of the genus Pareuchiloglanis . In this paper the authors describe P. abbreviatus and P. prolixdorsalis as new species and briefly redescribe P. gracilicaudata , P. kamengensis and P. myzostoma .