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Additional Early Triassic (late Olenekian) Ammonoids from the Osawa Formation at Yamaya, Motoyoshi area, South Kitakami Belt, Northeast Japan
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Abstract
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.
Received 15 2月 2015
Accepted 06 4月 2015
Acknowledgments:
The author thanks Ryohei Hashimoto for providing his specimens, and Yasunari Shigeta and Jim Jenks for their useful comments to improve this manuscript. This research was conducted under the financial support of the Saito Gratitude Foundation.
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