Classification:

Squamata

Mosasauroidea

Mosasauridae

Tylosaurinae

Species: T. proriger

Pronounciation: tye-lo-SAWR-us

Length: 12-15.8 metres long

Weight: 5 tonnes

When it lived: Late Cretaceous, 83-72 million years ago

Where it lived: USA (Kansas, Colorado, Montana, Texas)