Permian lyttoniid brachiopod Petasmaia from Akasaka, Mino Belt, central Japan

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概要

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• A lyttoniid brachiopod species, Petasmaia expansa Cooper and Grant, 1969, is described from the middle member (Neoschwagerina margaritae Zone; upper Murgabian) of the Akasaka Limestone within the Mino Belt of central Japan. Petasmaia is a rare brachiopod genus, with the only two known species identified so far obtained from the Lower and Middle Permian of West Texas and from the Middle Permian of Akasaka. The presence of P. expansa in the Akasaka area suggests that reef-seamount complexes of the Mino Belt, including those within the Akasaka area, formed in a mid-Panthalassan equatorial region between the Palaeotethys and the North American continent in the Middle Permian.

• 一般社団法人 日本地質学会の論文

著者

• Ono Teruo

  Honden 1552-141, Mizuho, Gifu Prefecture 501-0236, Japan

• Tazawa Jun-ichi

  Hamaura-cho 1-260-1, Chuo-ku, Niigata 951-8151, Japan

関連論文

• Permian lyttoniid brachiopod Petasmaia from Akasaka, Mino Belt, central Japan

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