Upper Aguja Formation
Brewster County, Texas, U.S.A
Upper Cretaceous - Campanian
70 Million Years Ago
Specimen size: approximately .5cm
Kritosaurus was a Hadrosaurid ground dwelling herbivorous dinosaur that is only known by a partial skull and lower jaw( Holotype AMNH 5799, an incomplete skull consisting of partial predentary, nearly complete dentaries, partial left and nearly complete right surangular, right splenial, and angular).
It's estimated that Kritosaurus length was 9 meters (30 feet) and its weight was 4 tonnes (4.4 short tons).