title: Phylogenetic relationships within the genus Jesogammarus (Crustacea, Amphipoda, Anisogammaridae) deduced from mitochondrial COI and 12S sequences.
abstract: The genus Jesogammarus contains 16 species in two subgenera, Jesogammarus and Annanogammarus. To examine relationships among species in the genus, a molecular phylogenetic study including eight species of the former subgenus and four of the latter was conducted using partial DNA sequences of the mitochondrial COI and 12S rRNA genes. MP, NJ, and ML trees based on the combined COI and 12S data indicated monophyly of the subgenus Annanogammarus, though the monophyly of Jesogammarus was left unresolved. Consistent with few morphological differences, Jesogammarus (A.) naritai and J. (A.) suwaensis showed low genetic differentiation and did not show reciprocal monophyly, which suggests a close affinity of these taxa.
authors.affiliation: Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan. tomikawa@sci.hokudai.ac.jp
authors.forename: Ko
authors.initials: K
authors.lastname: Tomikawa
authors.forename: Norio
authors.initials: N
authors.lastname: Kobayashi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Morino
authors.forename: Zhong-E
authors.initials: ZE
authors.lastname: Hou
authors.forename: Shunsuke F
authors.initials: SF
authors.lastname: Mawatari
mesh_terms: D033304:Amphipoda / Q000145:classification* / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D017931:DNA Primers; D004272:DNA, Mitochondrial / Q000737:chemistry*; D003576:Electron Transport Complex IV / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012335:RNA, Ribosomal / Q000235:genetics*; D016415:Sequence Alignment
chemical_list: D017931:DNA Primers; D004272:DNA, Mitochondrial; D012335:RNA, Ribosomal; C075526:RNA, ribosomal, 12S; D003576:Electron Transport Complex IV