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Issue: Vol. 2557 No. 1: 3 Aug. 2010
Type: Articles
Published: 2010-08-03
DOI: 10.11646/zootaxa.2557.1.1
Page range: 1–18
Abstract views: 47
PDF downloaded: 24

A new species of Lepidocephalichthys (Teleostei: Cobitidae) with distinctive sexual dimorphism and comments on relationships in southern lineages of Cobitidae

Florida Museum of Natural History, University of Florida, Dickinson Hall, Gainesville, FL 32611, USA Department of Zoology, University of Florida, 211 Bartram Hall, Gainesville, FL 32611, USA
Department of Zoology, University of Florida, 211 Bartram Hall, Gainesville, FL 32611, USA
Department of Equine Science, Faculty of Veterinary Medicine, Chiang Mai University,Chonlapratan Rd, Mae Hea, Muang, Chiang Mai, Thailand, 50100
The Northeastern Research Institute for Petrified Wood and Mineral Resources, Nakorn Ratchasima Rajabhat University, 184 Moo 7 Tambon Suranaree, Mouang District, Nakorn Ratchasima, Thailand, 30000
Department of Fisheries, Faculty of Agriculture, Ubonratchathani University 85, Sathollamark Rd., Warinchamrap, Ubon Ratchathani, Thailand, 34190
Department of Fisheries, Faculty of Agriculture, Ubonratchathani University 85, Sathollamark Rd., Warinchamrap, Ubon Ratchathani, Thailand, 34190
Fish Cypriniformes loaches phylogenetics dichromatism Thailand Vietnam Mun River Mekong

Abstract

Lepidocephalichthys (Telostei:Cobitidae) is diagnosed as being unique among cobitids in having the 7–8th pectoral rays of mature males modified. Recently collected material from Thailand included a new species of Lepidocephalichthys in which mature males have a large (extending over ~75% of the fin-ray length) dorsally projecting and serrated flange and a ventrally projecting flange. The ventrally projecting structure is unique among cobitids. An expanded phylogenetic analysis of cobitids, including previously published sequences and new material including the new species, reinforces the monophyly of Lepidocephalichthys. Relationships within southern lineages of cobitids, and the unusual habitat of the new species are discussed.

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