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Issue: Vol. 1463 No. 1: 30 Apr. 2007
Type: Articles
Published: 2007-04-30
DOI: 10.11646/zootaxa.1463.1.2
Page range: 13–20
Abstract views: 78
PDF downloaded: 5

Balantiocheilos ambusticauda, a new and possibly extinct species of cyprinid fish from Indochina (Cypriniformes: Cyprinidae)

Fish Division, Museum of Zoology, University of Michigan, 1109 Geddes Avenue, Ann Arbor, Michigan 48109-1079, USA. Raffles Museum of Biodiversity Research, Department of Biological Sciences, National University of Singapore, 6 Science Drive 2, #03-01, Singapore 117546
Case postale 57, Cornol, CH-2952, Switzerland (permanent address); and Raffles Museum of Biodiversity Research, Department of Biological Sciences, National University of Singapore, 6 Science Drive 2, #03-01, Singapore 117546
Cypriniformes Mekong Chao Phraya Systomini Osteobramae

Abstract

Balantiocheilos ambusticauda sp. nov. is described from the Mekong and Chao Phraya river drainages in Indochina (mainland Southeast Asia). It can be distinguished from its only congener, B. melanopterus, in having a shorter snout (27.5–33.9% HL vs. 33.2–39.1), posteriorly directed grooves at rictus curved (vs. straight), and narrower black margins on the pelvic and anal fins (on distal third or less vs. on distal half or more). The possibility that B. ambusticauda is extinct is also discussed.

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