中国条鳅新纪录种——Schistura porthos Kottelat,2000(英文)

在对澜沧江的亚流域罗梭江支流南星河的考察中,采集到一个中国条鳅新记录种。该物种经鉴定为Schistura porthos Kottelat,2000。该物种在罗梭江亚流域的发现延伸了其分布范围。

Taxonomical notes on selected freshwater fish species described from northern and central Vietnam （Cypriniformes： Balitoridae, Cobitidae, Cyprinidae, Nemacheilidae; Perciformes： Channidae, Osphronemidae; Synbranchiformes： Mastacembelidae）

Selected,little known taxa of northern and central Vietnamese freshwater fish species are reviewed.Nomenclatural acts are taken:Hemibarbus lehoai is placed in synonymy of H.maculatus,Paracobitis hagiangensis in synonymy of Schistura caudofurca.A neotype of Micronemacheilus bacmeensis is assigned.The name Channa hanamensis is treated as a nomen nudum.Two labeonine species described from China are nomenclaturally affected:Garra findolabium is transferred to Vinagarra and its specific epithet is treated as a noun in apposition;the specific epithet of Sinigarra napoense is corrected to napoensis.

Schistura megalodon species nova, a new river loach from the Irrawaddy basin in Dehong, Yunnan, China （Teleostei： Cypriniformes： Nemacheilidae）

A new species of river loach,Schistura megalodon sp.nov.,is described from the Irrawaddy basin in Yingjiang County,Dehong Autonomous Prefecture,Yunnan Province,China.The following combination of diagnostic characters serve to distinguish it from all other congeners in the given zoogeographical region: a large processus dentiformes in the upper jaw,a short pre-anus length of 65.4%-66.3% of SL,long paired fins(pectoral: 20.8%-24.2% of SL; pelvic: 17.9%-20.6% of SL),a wide body of 9.7%-11.3% of SL at anal fin origin,an incomplete lateral line,the absence of an orbital lobe,and a broad and distinct basicaudal bar with forward extensions.

Four new records of fish species （Cypriniformes： Nemacheilidae, Balitoridae; Characiformes： Prochilodontidae） and corrections of two misidentified fish species （Tetraodontiformes： Tetraodontidae; Beloniformes： Belonidae） in Yunnan, China

In this study, six fish species of five families are reported for the first time from Yunnan Province, China. The nemacheilid Schistura amplizona Kottelat, 2000 is reported from the Luosuojiang River and Nanlahe River subbasins, Mekong basin; the prochilodontid Prochilodus lineatus(Valenciennes, 1837), the balitorid Vanmanenia serrilineata Kottelat, 2000, and the tetraodontid Monotrete turgidus Kottelat, 2000, from Nanlahe River subbasin, Mekong basin; the balitorid Beaufortia daon(Mai, 1978), and the belonid Xenentodon canciloides(Bleeker, 1854), both, from Black River subbasin, Red River basin. The freshwater puffer M. turgidus and the needlefish X. canciloides have been previously misidentified as Tetraodon leiurus(Bleeker, 1950) and Tylosurus strongylurus(van Hasselt, 1823), respectively.

Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China （Teleostei： Cypriniformes： Nemacheilidae）

An ichthyofaunistic survey of Mekong tributaries in Lincang Prefecture, Yunnan Province, China yielded a new species of nemacheilid loach, herein described as Schistura sexnubes species nova. The new species is readily distinguishable from its congeners by the following combination of characters： 8＋8 branched caudal fin rays, an incomplete lateral line, a dissociated caudal bar, a shallow caudal peduncle depth （7.6%-9.6% SL; respectively caudal peduncle 1.76-1.95 times longer than deep）, a diminutive size of less than 50 mm SL, and no sexual dimorphism. A dorsocephalic pattern consisting of a black, forward directed V-shaped formation located between the nares, and a white, ovoid blotch on the upper operculum serves as an autapomorphy.

Range extension of Lepidocephalichthys alkaia （Teleostei： Cobitidae） and notes on its sexual dimorphism

The natural distributional range of the cobitid loach Lepidocephalichthys alkaia is extended into Yunnan Province, China. The modified sexually dimorphic pectoral fin in males of L. alkaia is described.