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†Ptychotrygon blainensis Case 1978
urn:lsid:organismnames.com:name:37446
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197
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†Ptychotrygon blainensis Case 1978
Case 1978. A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica Abteilung A Palaeozoologie-Stratigraphie, 160(1-6) 1978: 176-205