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Marco Endruweit. 2014: Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China (Teleostei:Cypriniformes:Nemacheilidae). 动物学研究, 35(1): 59-66. DOI: 10.11813/j.issn.0254-5853.2014.1.059
引用本文: Marco Endruweit. 2014: Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China (Teleostei:Cypriniformes:Nemacheilidae). 动物学研究, 35(1): 59-66. DOI: 10.11813/j.issn.0254-5853.2014.1.059
Marco Endruweit. 2014: Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China (Teleostei:Cypriniformes:Nemacheilidae). Zoological Research, 35(1): 59-66. DOI: 10.11813/j.issn.0254-5853.2014.1.059
Citation: Marco Endruweit. 2014: Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China (Teleostei:Cypriniformes:Nemacheilidae). Zoological Research, 35(1): 59-66. DOI: 10.11813/j.issn.0254-5853.2014.1.059

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

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

  • 摘要: 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.

     

    Abstract: 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.

     

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