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Pterotrigonia hokkaidoana

Pterotrigonia hokkaidoana (Yehara, 1915)

Invalid synonym: Pterotrigonia (Pterotrigonia) hokkaidoana, Trigonia hokkaidoana

• Extinct species: Late Jurassic, Tithonian - Late Cretaceous, Maastrichtian
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Bivalvia, order Trigoniida, family Pterotrigoniidae, genus Pterotrigonia

• Distribution
• Cretaceous: Hokkaido, Iwate, Gunma, Saitama