The last confirmed sighting dates back to 1917

Jakapil kaniukura is a basal thyreophore dinosaur that lived during the Middle Cretaceous in South America

The lower limbs were adapted for running

Its size would have been impressive

but they were continually replaced throughout its life

Diceratosaurus brevirostris Variant:Unprimed The last confirmed sighting datesDiceratosaurus brevirostris is an extinct genus of nectridian lepospondyl within the family Keraterpetontidae that lived in the Late Carboniferous Pennsylvanian and lasted from approximately 323. 2 million years ago to 298. 9 million years ago. Diceratosaurus fossils were first described by Edward Drinker Cope in 1874. The species D. brevirostris is well known from Jefferson County, Ohio, and approximately 50 specimens have been collected from the