Jurassic Morrison Marshosaurus Tooth VF-JC-24-034Marshosaurus bicentesimus Morrison Formation Brushy Basin Member Upper Jurassic Moffat County, Colorado Here is a great example of a Marshosaurus tooth prepared in its original matrix. The tooth is 3. 5 cm long and 1. 2 cm wide at the base of the tooth. The tooth is slender in cross section and the serrations are smaller than other Morrison carnivorous dinosaurs. The serrations on the mesial carina of the tooth appear to extend one half of the