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Placamen sp.

genus Placamen Iredale, 1925

• Modern species: late Eocene - Present (37.2 - 0.0 Ma)
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Bivalvia, order Venerida, family Veneridae

• Distribution
• Pliocene: Shizuoka
• Pleistocene: Tokyo, Chiba, Kanagawa