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Cylichnidae gen. et sp. indet., Chalice bubble snail(s)

family Cylichnidae H. Adams and A. Adams, 1854

• Modern species: Middle Jurassic - Present (167.7 - 0.0 Ma)
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Gastropoda, order Cephalaspidea

• Distribution
• Oligocene-Miocene: Nagano
• Miocene: Gifu
• Quaternary: Hiroshima
• Pleistocene: Ishikawa, Chiba, Mie
• Investigation in progress: Saitama (Miocene?)

• Subtaxa
• Cylichna affabilis
• Cylichna biplicata
• Cylichna kantoensis
• Decorifer, genus