Fossils of Cameroceras trentonense have been found in various parts of North America

También se han hallado restos fósiles que sugieren que podría haber competido con otros grandes mosasaurios

Fossils of Xiphactinus have been found in various locations around the world

around 68-66 million years ago

especially in the Dzulfian Sakamena Formation (approximately 252–247 million years old)

Atopodentatus unicus Magnapaulia Fossils of Cameroceras trentonense haveAtopodentatus unicus was a marine reptile from the Middle Triassic of China, known from fossils recovered from the Guanling Formation in Yunnan Province. Initially described in 2014 by Cheng and colleagues, this taxon quickly became one of the most unusual marine reptiles in the fossil record due to the extraordinary morphology of its skull and dentition. Its generic name may be interpreted as strange dentition or unusual teeth, in reference to the