Cephalopod fauna of the Nakadaira Formation(Lower Permian)in the Southern Kitakami Massif,Northeast Japan

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  • 994 Cephalopod fauna of the Nakadaira Formation (Lower Permian) in the Southern Kitakami Massif, Northeast Japan
  • Cephalopod fauna of the Nakadaira Forma

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Eight species referable to six genera of nautiloids and two species belonging to two genera of ammonoids are described from the Lower Permian Nakadaira Formation in the Southern Kitakami Massif, Northeast Japan. These nautiloids are Tainoceras, Foordiceras, Pleuronautilus, Aphelaeceras, Parastenopoceras and Stearoceras. Pleuronautilus yahagiensis is a newly proposed species. Ammonoids are Agathiceras and Artinskia. Agathicaras dominates the fauna.

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