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Pachydiscus sp.

genus Pachydiscus Zittel, 1884

• Extinct species: Late Cretaceous, Coniacian - Maastrichtian (89.3 - 66.0 Ma)
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Cephalopoda, subclass Ammonoidea, order Ammonitida, superfamily Desmocerataceae, family Pachydiscidae

• Distribution
• Cretaceous: Hokkaido, Osaka