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Named By: K. T. Smith & M. C. Buchy in 2008
Time Period: Late Cretaceous, 100 Ma
Location: Mexico - Agua Nueva Formation
Size: Uncertain, but the rear portion of the post cranial skeleton is 2 meters long, suggesting a small to medium size for this mosasaur
Diet: Carnivore
Fossil(s): Rear half of the post cranial skeleton
Classification: | Chordata | Reptilia | Squamata | Mosasauroidea |

Vallecillosaurus is an extinct genus of mosasauroid from the Late Cretaceous period, that lived in Mexico, in the state of Nuevo Leon.

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