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Phymosomatidae

Phymosomatidae

Phylum: Echinodermata
Class: Echinoidea
Order: Phymosomatoida
Family: Phymosomatidae

Genera of Phymosomatidae present in the Cretaceous of the Western Interior Seaway

Gauthieria

Gauthieria

Phymosoma

Phymosoma