Pareuchiloglanis
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| Pareuchiloglanis | ||||||||||||||||
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| Pareuchiloglanis poilanei Pellegrin, 1936 |
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P. abbreviatus[1] |
Pareuchiloglanis is a genus of catfishes (order Siluriformes) of the family Sisoridae. It includes twenty species.[1]
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[edit] Taxonomy
The monophyly of this genus remains doubtful.[2] In 2007, a study rejected the monophyly of this genus.[3]
The premaxillary tooth bands in the catfish tribe Glyptosternina are important in identifying genera; in Pareuchiloglanis, the tooth band is divided into two patches, appearing in two types. In one type, the premaxillary tooth patches appear separate, divided down the middle by a deeper indentation; this type is characteristic of P. kamengensis, P. feae, P. macropterus, and P. gongshanensis. This group is distributed in and to the west of the Lancangjiang River and overlaps the distribution of Oreoglanis, Pseudexostoma and Exostoma. In the other type, the premaxillary tooth patches appear to be joined with a shallow indentation in the middle; this type is characteristic of all other species of Pareuchiloglanis. This group is distributed in and to the east of the Lancangjiang.[1]
[edit] Distribution and habitat
Pareuchiloglanis species are rheophilic catfish chiefly found in the headwaters of major rivers in South and East Asia.[2] They originate from the Brahmaputra drainage in India, east and south to the Yangtze drainage in China and the Annam drainages in southern Vietnam.[4] Three species are known from the Mekong River: P. kamengensis, P. myzostoma, and P. gracilicaudata. Five species are known from the Lancangjiang drainage of China: P. abbreviatus, P. gracilicaudata, P. kamengensis, P. myzostoma, and P. prolixdorsalis.[1]
[edit] Description
Pareuchiloglanis species have an interrupted groove behind their lips (post-labial groove), gill openings not extending onto the underside (venter), homodont dentition of pointed teeth in both jaws, tooth patches in the upper jaw joined into a band and not produced posteriorly at sides, and 13–16 branched pectoral rays.[4] The head is depressed and the body is elongate and depressed anteriorly. The skin is smooth dorsally, but it is often tuberculate ventrally. The eyes are minute, dorsal, and under the skin (subcutaneous). The lips are thick, fleshy, and papillated. The paired fins are plaited to form an adhesive apparatus.[4]
[edit] References
- ^ a b c d e Li, Xu; Zhou, Wei; Thomson, Alfred W.; Zhang, Qing; Yang, Ying (2007). "A review of the genus Pareuchiloglanis (Sisoridae) from the Lancangjiang (upper Mekong River) with descriptions of two new species from Yunnan, China" (PDF). Zootaxa 1440: 1–19.
- ^ a b c d Ng, Heok Hee. "Two glyptosternine catfish (Teleostei: Sisoridae) from Vietnam and China" (PDF). Zootaxa 428.
- ^ Guo, Xianguang; He, Shunping; Zhang, Yaoguang (2007). "Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach". Hydrobiologia 579: 55–68. doi:.
- ^ a b c Thomson, Alfred W.; Page, Lawrence M. (2006). "Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes)" (PDF). Zootaxa 1345: 1–96.
