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Kazutaka Amano
Department of Geoscience, Joetsu Univeristy of Education
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Masui Hamuro
Toyama paleontological Research Club
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Toshikazu Hamuro
Toyama paleontological Research Club
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Tokiyuki Sato
Faculty of Engineering and Resource Science, Akita University
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Rio Ogihara
Fujioka 890-1, Fujioka City, Gunma 735-0024, Japan