Morewites, A New Campanian (Late Cretaceous) Heteromorph Ammonoid Genus from Hokkaido, Japan

Yasunari Shigeta

doi:10.2517/2014PR001

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Yasunari Shigeta¹

¹Department of Geology and Paleontology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan (e-mail: ) shigeta@kahaku.go.jp

Abstract

A new genus Morewites is herein erected for a Cretaceous heteromorph ammonoid from the Campanian (Upper Cretaceous) of Hokkaido, northern Japan. The new genus differs from previously described genera of the family Nostoceratidae by its minute helical initial whorls, whose axis of coiling is at right angles to that of its loosely elliptically coiled planispiral whorls.

Citation Download Citation

Yasunari Shigeta "Morewites, A New Campanian (Late Cretaceous) Heteromorph Ammonoid Genus from Hokkaido, Japan," Paleontological Research 18(1), 1-5, (1 January 2014). https://doi.org/10.2517/2014PR001

Received: 28 February 2013; Accepted: 1 April 2013; Published: 1 January 2014

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