Issue: Volume 51, Number 3
Date: August 2004
Pages: 228 - 232
A new species of amblycipitid catfish, Xiurenbagrus gigas (Teleostei: Siluriformes), from Guangxi, China
Yahui Zhao1, Jiahu Lan2 and Chunguang Zhang1
(1) Institute of Zoology, Chinese Academy of Sciences, 25 Beisihuan Xilu, Haidian, Beijing, 100080, P.R. China
(2) Aquatic Bureau of Duan, Anyang Town, Duan County, Guangxi, 530700, P.R. China
Abstract:
A new species of amblycipitid catfish is described based on five specimens (88.0â??164.5mm in standard length: SL) collected from the vicinity of Duan, Guangxi Zhuangzu Autonomous Region, southern China. The new species, Xiurenbagrus gigas, is different from all other known amblycipitid catfish, but similar to X. xiurenensis by having two patches of vomerine teeth. The new species can be distinguished from X. xiurenensis by having a larger head (head length: 27.9â??34.9% vs. 21.8â??26.4% SL; head depth: 14.4â??17.9% vs. 12.4â??14.1% SL; head width: 22.4â??29.4% vs. 18.1â??20.3% SL), lower adipose fin (4.6â??6.0% vs. 6.5â??8.3% SL), shorter distance from dorsal origin to adipose origin (25.7â??32.0% vs. 32.9â??38.9% SL), longer dorsal fin (21.2â??24.9% vs. 16.2â??19.1% SL), longer pectoral fin (18.4â??20.7% vs. 13.5â??16.8% SL), longer pelvic fin (13.1â??14.3% vs. 8.8â??11.8% SL), and more gill rakers (7â??9 vs. 5). Xiurenbagrus gigas, the largest known species in the family Amblycipitidae, is distributed in the Xijiang River, the longest tributary of the Zhujiang (Pearl) River basin.
Nio
