Journal
ZOOTAXA
Volume 4532, Issue 3, Pages 367-384Publisher
MAGNOLIA PRESS
DOI: 10.11646/zootaxa.4532.3.3
Keywords
Labeoninae; morphology; Cyt b gene; phylogenetic analysis
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Funding
- Powerchina Chengdu Engineering Corporation Limited
- National Nature Science Foundation of China [31400359]
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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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