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Geology
Chordata
Reptilia
Plesiosauria
Elasmosauridae
Elasmosauridae
Phylum:
Chordata
Class:
Reptilia
Order:
Plesiosauria
Family:
Elasmosauridae
Genera of Elasmosauridae present in the Cretaceous of the West Coast of the United States
Aphrosaurus
Fresnosaurus
Morenosaurus
