title: Monophyly and phylogenetic relationships of the catfish genus Glyptothorax (Teleostei: Sisoridae) inferred from nuclear and mitochondrial gene sequences.
abstract: Glyptothorax Blyth (1860) is the most species-diverse and widely-distributed genus in the Sisoridae, but few studies have examined monophyly of the genus and phylogenetic relations within it. We used the nuclear RAG2 gene and mitochondrial COI and Cyt b genes from 50 of the approximately 70 species to examine monophyly of Glyptothorax and phylogenetic relationships within the genus. Molecular phylogenetic trees were constructed using maximum parsimony, maximum likelihood and Bayesian inference methods. All methods strongly supported monophyly of Glyptothorax, with Bagarius as its sister group. Both analyses of two- and three-gene datasets recovered nine major subclades of Glyptothorax, but some internal nodes remained poorly resolved. The phylogenetic relationships within the genus and existing taxonomic problems are discussed.
authors.affiliation: State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, The Chinese Academy of Sciences, 32 East Jiaochang Road, Kunming, Yunnan 650223, PR China.
authors.forename: Wansheng
authors.initials: W
authors.lastname: Jiang
authors.forename: Heok Hee
authors.initials: HH
authors.lastname: Ng
authors.forename: Junxing
authors.initials: J
authors.lastname: Yang
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Chen
mesh_terms: D000818:Animals; D001208:Asia; D001499:Bayes Theorem; D002397:Catfishes / Q000145:classification / Q000235:genetics*; D002467:Cell Nucleus / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics*; D019143:Evolution, Molecular; D050259:Genes, Mitochondrial; D016013:Likelihood Functions; D010802:Phylogeny; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial