Mid Cretaceous, Cenomano-Turonian
 Family PTYCHODONTIDAE Jaekel, 1898

Ptychodus mammillaris Agassiz, 1835
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Ptychodus mammillaris
Agassiz, 1835
middle Cretaceous, Turonian, France
W=18mm
Ptychodus mammillaris
Agassiz, 1835
middle Cretaceous, Turonian, France
W=14mm
Ptychodus mammillaris
Agassiz, 1835
middle Cretaceous,
Turonian, France
W=14mm