3 Specimen Results

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Phylum

Order

Sphenacomorpha (3)

Class

Family

Sphenacodontidae (3)

has media

Has no media (2)

Individual/Organization

Sternberg, G.F. (3)

Walker, M.V. (2)

Gilmore, C.W. (1)

Period

Country

United States of America (3)

State/Province

Washington, D.C. (1)