Protosiren fraasi Scale:1:35 hard-shelled

hard-shelled

which represents a crucial phase in the evolution of cetaceans from their terrestrial ancestors towards forms more adapted to the aquatic environment

It is believed that the crest may have had multiple functions

their jaws were equipped with long conical teeth

Carcharodontosaurus hunted large herbivores such as sauropods

Protosiren fraasi Scale:1:35 hard-shelledProtosiren fraasi was one of the earliest marine mammals in the sirenian group, ancestors of modern manatees and dugongs. It lived during the Middle Eocene , approximately 40 million years ago, and its fossils have been found in regions of North Africa and the Middle East, including Egypt and Pakistan. This genus represents a key intermediate stage in sirenian evolution, when these animals were transitioning from a semi aquatic to a fully marine life.