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Class: Brachiopods
Order: Athyridida
Family: Athyrididae
Common: None
Genus List: Cleiothyridina, Composita
Formation List: GrahamThrifty
Age List: Virgilian
Formation: GrahamThrifty
Jack County | J1-550
Age: Virgilian
Formation: GrahamThrifty
Jack County | J1-540
Age: Virgilian
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