Profile view of Marshosaurus bicentesimus
Kingdom Animalia
Phylum Chordata
Superclass Tetrapoda
Class Reptilia
Subclass Diapsida
Superorder Dinosauria
Order Saurischia
Suborder Theropoda
Superfamily Megalosauroidea
Family Piatnitzkysauridae
Genus Marshosaurus
1st Species Marshosaurus bicentesimus
Other attributes
Time Range 153-150 mya
Location United States of America
Name Meaning Marsh's lizard
Physical Dimensions 4.2 meters long
Weight 225 kilograms
Dietary Classification Carnivore

Marshosaurus is a piatnitzkysaurid theropod dinosaur from the Late Jurassic of the United States of America. It was named in 1976 by James Madsen. It was one of the smaller Jurassic theropods in the Western United States, as well as one of the most obscure.


Marshosaurus was a theropod with a semi-bulky body, a long tail, long arms, and a large head with a mouth containing lots of big teeth. Most of its body would have been covered in scaly skin. Its body would have been covered in scaly skin.


Marshosaurus was a predator, preying on small ornithopods, small mammals, small pterosaurs, and smaller theropods. Its teeth had knife-like serrations from front to back, and were used to cut into the hides of large prey.


So far, all we know about Marshosaurus is that it had longer arms than most other theropods; those arms might have been used for getting a hold of prey, as well as slashing it.

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