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Nippononaia ryosekiana

Nippononaia ryosekiana (Suzuki, 1941)

• Extinct species
• Habitat: Freshwater

• Classification
• kingdom Animalia, phylum Mollusca, class Bivalvia, order Trigoniida, family Nippononaiidae, genus Nippononaia
• Some reports classify this species to order Unionoida, family Unionidae

• Distribution
• Cretaceous: Gunma