A new species of sisorid catfish of the genus Exostoma from the Salween drainage, Yunnan, China

Xiao-Yong Chen1,2,*, William J. Poly3, David Catania3, Wan-Sheng Jiang2

1 Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences, Yezin Nay Pyi Taw 05282, Myanmar

2 Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China

3 Department of Ichthyology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco CA 94118, USA

PubYear: 2017

Volume: 38(5)


Page number: 291-299

Abstract: A new species of the sisorid catfish genus Exostoma Blyth, 1860 was collected from two hill-stream tributaries of the Nujiang (Salween River) drainage in Gaoligong Mountain, south-western Yunnan Province, China from 2003 to 2006 and from two tributaries of the Salween River in Cangyuan County, Lingcang Prefecture, Yunnan Province, China (in 2007) and in Yongde County, Lingcang Prefecture, Yunnan Province, China (in 2015). Exostoma gaoligongense sp. nov. is the 10th species of the genus and is most similar to E. vinciguerrae in morphology but can be distinguished by pelvic fin reaching anus vs. not reaching; maxillary barbels just reaching or slightly surpassing pectoral-fin origin vs. surpassing pectoral-fin origin or even reaching posterior end of gill membrane; abdominal vertebrae 23–25 vs. 25–27; length of dorsal fin/dorsal to adipose distance 90.3%–287.0% vs. 59.2–85.7. A key to Exostoma spp. is provided.

Key words: Glyptosterninae; Sisoridae; Nujiang; Gaoligong Mountain; Yunnan