Phylogenetic analysis of caprellid and corophioid amphipods (crustacea) based on the 18S rRNA gene, with special emphasis on the phylogenetic position of phtisicidae

Atsushi Ito, Hiroshi Wada, Masakazu N. Aoki

研究成果: Article

25 引用 (Scopus)

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Members of the amphipod suborder Caprellidea exhibit degenerated abdomens and pereopods 3 and 4. Some genera of Podoceridae (Gammaridea, Corophioidea) such as Dulichia also show reduced abdomens and pereopods and thus are generally regarded as a sister group of the Caprellidea. In addition, one of the caprellid families, the Caprogammaridae, exhibits abdominal segments that are similar to those of the podocerids, as well as rudimentary pereopods 3 and 4, which are more consistent with those of other caprellids. Therefore, an evolutionary scheme has been suggested on the basis of the gradual degeneration of the pereopods and abdomen: [Dulichia, (caprogammarids, caprellids)]. However, the Phtisicidae (Caprellidea) contradict this hypothesis because they exhibit well-developed pereopods 3 and 4, along with degenerated abdomens. Therefore, previous studies have suggested that the Phtisicidae and other caprellids may be polyphyletic. We examined the phylogenetic position of the Phtisicidae and other caprellid amphipods, using 18S rRNA gene sequence data. The results strongly indicate that the Phtisicidae and other caprellid families form a monophyletic clade. However, a close phylogenetic relationship among Dulichia (Corophioidea) and taxa belonging to the Caprellidea was not definitively supported. This study is the first to use molecular data to investigate the phylogenetic relationships among the Caprellidea.

元の言語English
ページ(範囲)176-183
ページ数8
ジャーナルBiological Bulletin
214
発行部数2
DOI
出版物ステータスPublished - 2008 4
外部発表Yes

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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