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Family:Ptychodontidae Individual/Organization:Darnell, M.K.

FHSM VP-2121
Ptychodus mortoni (Agassiz, 1843)
Formation: Niobrara
Period(Early): Cretaceous

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FHSM VP-15284
Ptychodus mammillaris (Agassiz, 1839)
Formation: Carlile
Period(Early): Cretaceous

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