Trophonopsis Bucquoy, Dautzenberg and Dollfus, 1882 (Gastropoda, Muricidae) from the Plio-Pleistocene deposits in Japan

KAZUTAKA AMANO

doi:10.2517/prpsj.10.163

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KAZUTAKA AMANO¹

¹Department of Geoscience, Joetsu University of Education, Joetsu 943-8512, Japan (e-mail: ) amano@juen.ac.jp (Japan)

Abstract

The Plio-Pleistocene Trophonopsis in northern Japan consists of seven species: T. kamchatkana (Dall), T. uyemurai (Yokoyama), T. sasae Sawada, T. vermeiji Amano, sp. nov., T. aff. densicostata Golikov in Golikov and Scarlato, T. aff. undocostata Golikov and Sirenko and T. sp.. Trophon toyamai Hatai and Nisiyama and T. kagaensis Hatai and Nisiyama are synonymous with Trophonopsis uyemurai. By the end of the early Pleistocene, T. uyemurai, T. sasae and T. vermeiji became extinct and T. aff. undocostata and T. sp. might have become extinct, owing to decrease of salinity in shallow water during the low stands of the glacial Pleistocene.

Citation Download Citation

KAZUTAKA AMANO "Trophonopsis Bucquoy, Dautzenberg and Dollfus, 1882 (Gastropoda, Muricidae) from the Plio-Pleistocene deposits in Japan," Paleontological Research 10(2), 163-176, (1 June 2006). https://doi.org/10.2517/prpsj.10.163

Received: 14 November 2005; Accepted: 1 February 2006; Published: 1 June 2006

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