A New Pliocene Species of Swiftopecten (Bivalvia: Pectinidae) from the Zukawa Formation in Toyama Prefecture, Central Japan

Taro Yoshimura

doi:10.2517/2016PR030

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Taro Yoshimura¹

¹Keio Senior High School, 4-1-2 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8524, Japan (e-mail: ) t.yoshimura@keio.jp

Abstract

A new pectinid species, Swiftopecten djoserus sp. nov. is described from the Pliocene Zukawa Formation in Takaoka City, Toyama Prefecture in Central Honshu. This species can be distinguished from S. swiftii, the type species of the genus, by its smaller size, the fewer fine radial riblets on both valves, the wider umbonal angle and the more uneven ledges. Swiftopecten djoserus sp. nov. is an extinct species of the Omma-Manganji fauna that occurred locally in the central part of the Sea of Japan borderland during the latest Pliocene.

Citation Download Citation

Taro Yoshimura "A New Pliocene Species of Swiftopecten (Bivalvia: Pectinidae) from the Zukawa Formation in Toyama Prefecture, Central Japan," Paleontological Research 21(3), 293-303, (1 July 2017). https://doi.org/10.2517/2016PR030

Received: 14 February 2016; Accepted: 1 November 2016; Published: 1 July 2017

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