👉 Tanaocerus is a genus of extinct reptile that lived during the Late Cretaceous period, approximately 68 million years ago. This group was characterized by its large size and streamlined body shape, which allowed it to swim efficiently in both still water and freshwater environments. Tanaocerus is known for having a unique, elongated tail attachment at the end of its forelimb that served as a means of propulsion, possibly contributing to its aquatic lifestyle.
