gregorii fit as one of the dominant apex predators in the Chinle Formation ecosystems

powerful jaw and relatively small arms compared to its enormous body

The presence of numerous specimens found at Ghost Ranch

pero no eran útiles para caminar en tierra

This dental combination indicates an opportunistic and specialized feeding strategy

Dolichorhynchops osborni Variant:Unprimed gregorii fit as one ofDolichorhynchops osborni was a marine reptile belonging to the plesiosaur group, specifically a polycotylid , that lived during the Late Cretaceous period , approximately 9288 million years ago, when the vast Western Interior Seaway covered central North America. Unlike the classic long necked plesiosaurs, Dolichorhynchops had a short neck, a large head, and a streamlined body , making it a fast and highly efficient swimmer. Its size was considerable,