Tenontosaurus

Tenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. It was formerly thought to be a 'hypsilophodont', but since Hypsilophodontia is no longer considered a clade, it is now considered to be a very primitive iguanodont.

Tenontosaurus Temporal range: Lower Cretaceous
Mounted skeleton, North Carolina Museum of Natural Sciences
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	Dinosauria
Order:	Ornithischia
Suborder:	Cerapoda
Infraorder:	Ornithopoda
Genus:	Tenontosaurus Ostrom, 1970
Species
T. tilletti Ostrom, 1970 (type) T. dossi Winkler, Murray & Jacobs, 1997