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The molecular phylogeny of the Buccinidae (Caenogastropoda: Neogastropoda) as inferred from the complete mitochondrial 16S rRNA gene sequences of selected representatives

SEIJI HAYASHI
Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan. 
E-mail: seijih@geobio.eps.nagoya-u.ac.jp

Complete mitochondrial 16S rRNA gene sequences from 35 caenogastropods were obtained to evaluate the phylogenetic relationship of the family Buccinidae at the intra-supra familial level. With respect to intergeneric relationships within the family, the molecular phylogeny supported three clades with statistical significance: Buccinum + Neptunea, Engina + Pisania + Pollia and Penion + Kelletia. These groupings are generally consistent with the morphological and paleontological evidence. In particular, it is noteworthy that the monophyly of Penion and Kelletia was established. Their close relationship as antitropical genera is confirmed for the first time. Babylonia was positioned remotely from the other buccinids confirming recent morphological and molecular work. The monophyly of the current concept of Buccinidae was violated by intercalations of nassariids and fasciolariids.

Key words: Buccinoidea, Buccinulinae, Pisaniinae, fossil record, antitropical distribution

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