Tylosaurus prorigor
Tylosaurus prorigor
Pronunciation: (TIE -low-SORE-us pro-RIG-or)
Meaning of name: Knot lizard, stiff in front
Length: 43 feet (13 meters)
Weight: Estimated 2 tons (1,800 kg)
Diet: Fish, ammonites, other marine reptiles
Range: North America (Kansas)
Age: Late Cretaceous, 85-78 million years ago
What's real?: The skeleton is a cast of the original at the Kansas University Museum of Natural History
What is it?: Tylosaurus is a mosasaur and not a dinosaur. It's related to monitor lizards.



