`` Tenontosaurus '' , `` Hypsilophodon '' , `` Iguanodon '' , `` Protohadros '' , and `` Eolambia '' are some of the ornithopods that lived during this time period .
`` Tenontosaurus '' , `` Hypsilophodon '' , `` Iguanodon '' , `` Protohadros '' , and `` Eolambia '' are some of the ornithopods that lived then .