Megacephalosaurus
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Megacephalosaurus is an extinct genus of short-necked pliosaur that inhabited the Western Interior Seaway of North America about 94 to 93 million years ago during the Turonian stage of the Late Cretac
Views from different angles of the skull and right mandible of the holotype specimen of M. eulerti (FHSM VP-321).
Placochelys BW
Nothosaurus BW
Leptocleidus BW
Cretoxyrhina
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Cretoxyrhina is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous. The type species, C. mantelli, is
Megacephalosaurus
…number of present species but nevertheless encompassed a wide ecological diversity. Sharks constituted the majority of vertebrate diversity, of which Cretoxyrhina and Squalicorax were the most common. Other types of sharks that were present included the mackerel sharks Cretalamna, Cardabiodon, Cretodus, Archaeolamna…
Zahn eines Cretoxyrhina mantelli
Syntypes of C. mantelli (Fig. 1-9) and other species in the third volume of Recherches sur les poissons fossiles
George F. Sternberg found many exceptionally well-preserved Cretoxyrhina skeletons including KUVP 247 and FHSM VP-2187.
Cretoxyrhina is similar to the modern great white shark in size, shape, and ecology.