著者

川口 博憲 狩野 泰則 三浦 知之

出版者

日本貝類学会

雑誌

ちりぼたん (ISSN:05779316)

巻号頁・発行日

vol.37, no.2, pp.45-53, 2006-07-20

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This paper provides new knowledge on the geographic distribution, habitat preference and identification of Littoraria species on the tidal flats of mainland Japan. Littoraria ardouniana is first recorded from Kyushu and Honshu islands. Other mainland species include L. intermedia and L. sinensis, which have been frequently confused with each other in previous literature. The color of the kidney is used here as a new taxonomic character for the genus to distinguish the latter two taxa. A few juveniles of L. scabra have been collected from the Kii Peninsula in Honshu, but they presumably represent incidental occurrences of this tropical planktotrophic species. At the mouth of Honjo River in southern Kyushu, L. ardouniana, L. intermedia and L. sinensis abundantly co-occur on rocks and concrete walls in the upper littoral zone, while the first species is also found on reeds and tree branches in the supralittoral zone.