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Issue: Vol. 4532 No. 3: 19 Dec. 2018
Type: Article
Published: 2018-12-19
DOI: 10.11646/zootaxa.4532.3.3
Page range: 367–384
Abstract views: 89
PDF downloaded: 3

Two new species of Garra (Cypriniformes: Cyprinidae) from the lower Yarlung Tsangpo River drainage in southeastern Tibet, China

The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei Province, P. R. China University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 310, 12587 Berlin, Germany
The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei Province, P. R. China University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Powerchina Chengdu Engineering Corporation Limited, Chengdu 610072, Sichuan Province, P. R. China
The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei Province, P. R. China
The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei Province, P. R. China
Powerchina Chengdu Engineering Corporation Limited, Chengdu 610072, Sichuan Province, P. R. China
The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei Province, P. R. China
Pisces Labeoninae morphology Cyt b gene phylogenetic analysis

Abstract

Two new species of the fish genus Garra (Cypriniformes: Cyprinidae) are described from the lower Yarlung Tsangpo River drainage in southeastern Tibet, China. Garra motuoensis, a member of the proboscis species group, is primarily distinguished from the members of this group by having a prominent, quadrate, and slightly bilobed proboscis; 6–20 small to middle-sized unicuspid tubercles on the anterior region of the proboscis, some middle-sized unicuspid tubercles on the transverse lobe of the snout, and several small unicuspid tubercles on the lateral surface of snout; the anus situated slightly closer to the anal-fin origin than to the pelvic-fin origin (distance from anus to anal fin 36–46% of pelvic-anal distance); 36–37 lateral-line scales; and 12 circumpeduncular scales. Garra yajiangensis, a member of the proboscis species group, is primarily distinguished from the members of this group by having a prominent, quadrate, and slightly bilobed proboscis, covered with 2–7 middle-sized unicuspid tubercles, including two large-sized tubercles on anterior margin of each lobe; some small unicuspid tubercles on the transverse lobe and the lateral surface of snout; the anus situated substantially closer to the anal-fin origin than to the pelvic-fin origin (distance from anus to anal fin 19–24% of pelvic-anal distance); 34–36 lateral-line scales; and 12 circumpeduncular scales. The validities of these two new species were also corroborated by molecular phylogenetic analysis based on Cyt b gene sequences.

 

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