Additional Early Triassic (late Olenekian) Ammonoids from the Osawa Formation at Yamaya, Motoyoshi area, South Kitakami Belt, Northeast Japan

Masayuki Ehiro

doi:10.2517/2015PR016

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Masayuki Ehiro¹

¹The Tohoku University Museum, Tohoku University, 6–3 Aramaki Aoba, Aoba-ku, Sendai, Miyagi 980–8578, Japan (e-mail: ) ehiro@m.tohoku.ac.jp

Abstract

Two Early Triassic (late Olenekian) ammonoids, Khvalynites sp. and Pseudosageceras multilobatum Noetling, are described from an outcrop of the Osawa Formation at Yamaya in the Motoyoshi area, South Kitakami Belt, Northeast Japan. This is the first report from Japan of the genus Khvalynites and the species Pseudosageceras multilobatum. The ammonoid fauna of the Osawa Formation is diverse and comprises nineteen genera, including two that are undescribed.

Citation Download Citation

Masayuki Ehiro "Additional Early Triassic (late Olenekian) Ammonoids from the Osawa Formation at Yamaya, Motoyoshi area, South Kitakami Belt, Northeast Japan," Paleontological Research 20(1), 1-6, (1 January 2016). https://doi.org/10.2517/2015PR016

Received: 15 February 2015; Accepted: 1 April 2015; Published: 1 January 2016

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