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Potamides yokoyamai japonica, Vicarya yokoyamai japonica

Potamides (Vicarya) yokoyamai forma japonica Yabe and Hatai, 1938

Invalid synonym: Vicarya japonica, Vicarya callosa japonica

• Extinct species
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Gastropoda, order Caenogastropoda, family Potamididae, genus Potamides, subgenus Vicarya, Potamides yokoyamai

• Distribution
• Miocene: Niigata, Kyoto, Okayama
• Investigation in progress: Ishikawa