Tenontosaurus ( ; meaning "sinew lizard") is a genus of medium- to large-sized ornithopoddinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago.
Tenontosaurus ( ; meaning "sinew lizard") is a genus of medium- to large-sized ornithopoddinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago.