Please wait a minute...
ZOOLOGICAL RESEARCH    2014, Vol. 35 Issue (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)
Marco Endruweit
Qingshan Road 601, Qingdao, China
Download: PDF(1606 KB)   RICH HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks    
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.
Keywords Schistura sexnubes      New species      Mekong basin      Nemacheilidae      Yunnan     
E-mail this article
E-mail Alert
Articles by authors
Marco Endruweit
Cite this article:   
Marco Endruweit. Schistura sexnubes, a new diminutive river loach from the upper Mekong basin, Yunnan Province, China (Teleostei:Cypriniformes:Nemacheilidae)[J]. ZOOLOGICAL RESEARCH, 2014, 35(1): 59-66.
URL:     OR
Bleeker P. 1863. Sur les genres de la famille des Cobitioïdes. Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeling Natuurkunde, (15): 32-44. (in French)
Chen XY, Kong DP, Yang JX. 2005. Schistura cryptofasciata, a new loach (Cypriniformes: Balitoridae) from Salween drainage in Yunnan, southwestern China. The Raffles Bulletin of Zoology Suppl., (13): 27-32.
Chen XY, Pan XF, Yang JX. 2010. Chapter 13 Fishes. In: Wang J, Du F, Yang YM. Survey and Research on the Upper Mekong River Provincial Nature Reserve, Yunnan, China, 373-407. (in Chinese)
Chen ZM, Yang JX, Qi WL. 2005. Description of a new loach of Schistura from Lancang River basin, Yunnan China. Acta Hydrobiologica Sinica, 29(2): 146-149.
Endruweit M. 2011. Schistura porthos Kottelat, 2000, a new record of nemacheilid loach for China. Zoological Research, 32 (5): 572-574.
Fowler HW. 1934. Zoological results of the third De Schauensee Siamese Expedition, Part I. Fishes. Proceedings of the Academy of Natural Sciences of Philadelphia, (86): 67-163.
Kottelat M. 1990. Indochinese nemacheilines. Verlag Dr. Friedrich Pfeil, M黱chen.
Kottelat M. 2000. Diagnoses of a new genus and 64 new species of fishes from Laos (Teleostei: Cyprinidae, Balitoridae, Bagridae, Syngnathidae, Chaudhuriidae and Tetraodontidae). Journal of South Asian Natural History, 5 (1): 37-82.
Kottelat M. 2001. Fishes of Laos. Wildlife Heritage Trust Publications, Colombo: 1-198, Pls. 1-48.
Ou C, Montaña CG, Winemiller KO, Conway KW. 2011. Schistura diminuta, a new miniature loach from the Mekong River drainage of Cambodia (Teleostei: Nemacheilidae). Ichthyological Exploration of Freshwaters, 22 (3): 1193-200.
Smith HM. 1945. The freshwater fishes of Siam, or Thailand. Bulletin of the United States National Museum, 188: i-xi,1-622.
Zheng LP, Chen XY, Yang JX. 2009. Composition and Status of Fishes of Nanla River in Xishuangbanna, Yunnan, China. Zoological Research, 30(3): 334-340.
Zhu SQ. 1982. Five new species of fishes of the genus Nemachilus from Yunnan Province, China. Acta Zootaxonomica Sinica, 7(1): 104-111. (in Chinese, English summary)
Zhu SQ. 1989. The loaches of the subfamily Nemacheilinae in China. Nanjing. (in Chinese)
Zhu SQ, Wang SH. 1985. The noemacheiline fishes from Yunnan Province, China (Cypriniformes: Cobitidae). Acta Zootaxonomica Sinica, 10(2): 208-220. (in Chinese, English summary)
[1] Ya-Mi Zheng, Zhong-E Hou. Myanmarorchestia victoria sp. nov. (Crustacea, Amphipoda, Talitridae), a new species of landhopper from the high altitude forests in Myanmar[J]. Zoological Research, 2017, 38(5): 281-290.
[2] Xiao-Yong Chen, William J. Poly, David Catania, Wan-Sheng Jiang. A new species of sisorid catfish of the genus Exostoma from the Salween drainage, Yunnan, China[J]. Zoological Research, 2017, 38(5): 291-299.
[3] Fei Li, Xi Zheng, Xue-Long Jiang, Bosco Pui Lok Chan. Rediscovery of the sun bear (Helarctos malayanus) in Yingjiang County,Yunnan Province,China[J]. Zoological Research, 2017, 38(4): 206-207.
[4] Liang Fei, Chang-Yuan Ye, Yu-Fan Wang, Ke Jiang. A new species of the genus Amolops (Anura: Ranidae) from high-altitude Sichuan, southwestern China, with a discussion on the taxonomic status of Amolops kangtingensis[J]. ZOOLOGICAL RESEARCH, 2017, 38(3): 138-145.
[5] Yu-Yi WU, Zhi-Yu SUN, Yan-Shu GUO. A new species of the genus Triplophysa (Cypriniformes: Nemacheilidae), Triplophysa daochengensis, from Sichuan Province, China[J]. ZOOLOGICAL RESEARCH, 2016, 37(5): 290-296.
[6] Hong-Fu YANG, Wei-Xian LI, Zi-Ming CHEN. A new cave species of the Genus Triplophysa from Yunnan, China[J]. ZOOLOGICAL RESEARCH, 2016, 37(5): 297-300.
[7] Marco ENDRUWEIT. Range extension of Lepidocephalichthys alkaia (Teleostei: Cobitidae) and notes on its sexual dimorphism[J]. ZOOLOGICAL RESEARCH, 2016, 37(3): 186-188.
[8] Ke JIANG, Fang YAN, Kai WANG, Da-Hu ZOU, Cheng LI, Jing CHE. A new genus and species of treefrog from Medog, southeastern Tibet, China (Anura, Rhacophoridae)[J]. ZOOLOGICAL RESEARCH, 2016, 37(1): 15-20.
[9] Si-Li YAN, Zhi-Yu SUN, Yan-Shu GUO. A new species of Triplophysa Rendahl (Cypriniformes, Nemacheilidae) from Sichuan Province, China[J]. ZOOLOGICAL RESEARCH, 2015, 36(5): 299-304.
[10] Fang YANG, Yi-Qun ZHANG. Quantities and distribution of the Black-necked Crane (Grus nigricollis) and other large waterfowl on the Yunnan and Guizhou Plateau[J]. ZOOLOGICAL RESEARCH, 2014, 35(S1): 80-84.
[11] Xiao-Jun YANG, Yun-Yan CHANG. Cranes and Their Research in Yunnan Province[J]. ZOOLOGICAL RESEARCH, 2014, 35(S1): 51-60.
[12] Marco Endruweit. Schistura megalodon species nova, a new river loach from the Irra-waddy basin in Dehong, Yunnan, China (Teleostei: Cypriniformes: Nemacheilidae)[J]. ZOOLOGICAL RESEARCH, 2014, 35(5): 353-361.
[13] Marco Endruweit. Taxonomical notes on selected freshwater fish species described from northern and central Vietnam (Cypriniformes:Balitoridae, Cobitidae, Cyprinidae, Nemacheilidae; Perciformes:Channidae, Osphronemidae; Synbranchiformes:Mastacembelidae)[J]. ZOOLOGICAL RESEARCH, 2014, 35(2): 142-159.
[14] Marco Endruweit. 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[J]. ZOOLOGICAL RESEARCH, 2014, 35(1): 51-58.
[15] Shu-Wei LIU, Xiao-Yong CHEN. Two new Cypriniformes fish records from Yunnan Province—Carassioides acuminatus and Hemimyzon pumilicorpora[J]. ZOOLOGICAL RESEARCH, 2013, 34(5): 504-506.
Full text