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Protocallithaca adamsi, Adams' thin shelled littleneck(s)

Protocallithaca adamsi (Reeve, 1863)

Invalid synonym: Callithaca adamsi, Mercenaria y-iizukai, Mercenaria yiizukai, Securella yiizukai

• Modern species: middle Miocene - Present (16.0 - 0.0 Ma)
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Bivalvia, family Veneridae, genus Protocallithaca

• Distribution
• Miocene: Kanagawa
• Pliocene: Aomori, Niigata
• Pleistocene: Hokkaido, Ibaraki, Tokyo, Chiba
• Investigation in progress: Nagano