36 Specimen Results

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Phylum

Order

Ammonitida (18)

Neogastropoda (10)

Class

Cephalopoda (18)

Gastropoda (10)

Family

Collignoniceratidae (10)

Inoceramidae (8)

Placenticeratidae (6)

Scaphitidae (2)

Genus

Collignoniceras (9)

Cremnoceramus (6)

Placenticeras (6)

Prionocyclus (1)

Rostellites (10)

Individual/Organization

Sternberg, G.F. (8)

Sternberg, C.H. (2)

Van Wormer, F.H. (15)

Stewart, W.D. (1)

Period

Cretaceous (36)

Formation

Member

Country

United States of America (36)

State/Province

South Dakota (1)

County