Styracosaurus Americanum

Styracosaurus Americanum is an extinct species of Ceratopsid (also including a modern day Korean goatbird and was one of the last ever Styracosaurus species and among the last ever Centrosaurines, along with Pachyrhinosaurus Argentinus. It was slightly larger than Triceratops, making Styracosaurus Americanum the largest known species of Ceratospids in existence. It also lived in what is now Argentina during the Late Cretaceous from 77 million years ago to 66 million years ago. They were most likely completely herbivorous as their bones and fossilized stomachs had confirmed. They were probably solitary animals and fed on different plant matter from Pachyrhinosaurus Argentinus to reduce most of competition from the two species of large South American Ceratopsids. It is unknown on why the Styracosaurus Americanum had suddenly became extinct.