Molecular phylogeny of vestimentiferans collected around Japan, revealed by the nucleotide sequences of mitochondrial DNA |
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| Authors: | S Kojima R Segawa J Hashimoto S Ohta |
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| Institution: | (1) Ocean Research Institute, University of Tokyo, 1‐15‐1 Minamidai, Nakano, Tokyo 164, Japan, JP;(2) Department of Biology, Faculty of Science, Tokyo Metropolitan University, 1‐1 Minami-Osawa, Hachioji, Tokyo 192‐03, Japan, JP;(3) Japan Marine Science and Technology Center, 2‐15 Natsushima, Yokosuka, Kanagawa 237, Japan, JP |
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| Abstract: | The phylogenetic relationships among local populations of undescribed vestimentiferan species that belong to the genera Lamellibrachia and Escarpia and had been collected at six sites around Japan were analyzed on the basis of the partial (1023 bp) nucleotide sequences
of the mitochondrial gene for cytochrome oxidase I (COI), using a pogonophoran and a polychaete as outgroups. The identical
amino acid sequence was deduced from the nucleotide sequence obtained from each of the vestimentiferans analyzed. The strong
similarity among deduced amino acid sequences of COI suggested a close relationship between vestimentiferans and pogonophorans.
On the basis of the phylogenetic relationships, the analyzed vestimentiferan populations were classified tentatively as five
species. The genetic differentiation of vestimentiferans was suggested to occur bathymetrically as well as being a consequence
of horizontal segregation. Two of these tentatively identified species inhabit both a hydrothermal area and a cold seep area,
as is the case for some species of bivalves that belong to the genera Bathymodiolus and Calyptogena.
Received: 28 August 1996 / Accepted: 2 October 1996 |
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