his body was relatively light

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

although no direct evidence has been found in the discovered fossils

pero no eran útiles para caminar en tierra

Dilophosaurus fossils have been found to have teeth marks from other theropod dinosaurs

Dolichorhynchops osborni Variant:Unprimed his body was relatively lightDolichorhynchops 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,