Mosasaurs are large, extinct, marine reptiles. Mosasaurs probably evolved from semiaquaticsquamates[1] known as aigialosaurs, which were more similar in appearance to modern-day monitor lizards, in the Early Cretaceous. During the last 20 million years of the Cretaceous period (Turonian-Maastrichtian), with the extinction of the ichthyosaurs and decline ofplesiosaurs, mosasaurs became the dominant marine predators.

M A R I N E

Mosasaurs are large, extinct, marine reptiles. These massive creatures evolved from aquaticsquamates known as aigialosaurs, which were more similar in appearance to modern-day monitor lizards, in the Early Cretaceous.

R E P T I L E S

D E E P S E A

M O S A S A U R

P L E S I O S A U R

Check out the gallery

4