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Costocyrena sp.

genus Costocyrena Hayami, 1975

• Extinct species: Early - Late Cretaceous
• Habitat: Brackish

• Classification
• kingdom Animalia, phylum Mollusca, class Bivalvia, family Neomiodontidae

• Distribution
• Jurassic-Cretaceous: Nagano
• Cretaceous: Gunma, Saitama, Wakayama, Tokushima

• Subtaxa
• C. otsukai
• C. radiatostriata