genus of reptiles (fossil)
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.
Temporal range: Lower Cretaceous
|Mounted skeleton, North Carolina Museum of Natural Sciences|