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Pterophyllum pachyrachis (Bennettitales) from the Upper Jurassic to Lower Cretaceous Tetori Group, Fukui Prefecture, Central Japan
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Abstract
Abstract.
We designate the lectotype of Ptilophyllum pachyrachis Oishi (
1940
), collected from the Upper Jurassic (Tithonian) to Lower Cretaceous (Berriasian) Ashidani Formation of the Tetori Group exposed in Mochiana, Ohno City, Fukui Prefecture, Central Japan. We further propose a reclassification of this species to the genus Pterophyllum. We found that Oishi's (
1940
) syntypes included one Ptilophyllum specimen that reflected Eurosinian-type vegetation, contrary to the widely accepted idea that typical Siberian-type vegetation flourished in the Tetori Group region during the Tithonian to Berriasian.
Received 10 7月 2020
Accepted 08 11月 2020
Acknowledgments:
We are grateful to Y. Kobayashi for his assistance with reexamining the syntypes and thank T. Nakada for kindly providing advice on the taxonomic treatment.
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