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meaning: "Knob lizard"
Named By: Othniel Charles Marsh in 1872
Time Period: Late Cretaceous, 86.5-75 Ma
Location: Canada. USA, particularly the central states
Size: Up to 15 meters long
Diet: Carnivore
Fossil(s): Many Specimens as well as numerous teeth
Classification: | Chordata | Reptilia | Squamata | Scleroglossa | Anguimorpha | Mosasauridae | Tylosaurinae |

Tylosaurus (Greek tulos/tylos "protuberance, knob" + Greek sauros/sauros "lizard") was a mosasaur, a large, predatory marine lizard closely related to modern monitor lizards and to snakes.

Read more about Tylosaurus at Wikipedia
PaleoCodex is a weekend hack by Saurav Mohapatra