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Portlandia sp.

genus Portlandia Mörch, 1857

• Modern species: Early Cretaceous - Present (125.5 - 0.0 Ma)
• Habitat: Marine

• Classification
• kingdom Animalia, phylum Mollusca, class Bivalvia, order Nuculoida, family Yoldiidae

• Distribution
• Oligocene: Hokkaido
• Miocene: Tochigi, Aichi, Mie, Tottori, Shimane
• Miocene-Pliocene: Hokkaido
• Investigation in progress: Saitama (Miocene?)

• Species
• P. chehalisensis
• P. gratiosa
• P. kakimii
• P. ovata
• P. watasei