Jeholoceratops

Jeholoceratops is an extinct Cenozoic Protoceratops-like ceratopsid that lived in what is now China during the Eocene (from 56 million years ago to 34 million years ago). It evolved from a group of Koreaceratops that survived the mass extinction, but unlike modern Korean goatbirds, this species evolved into a fully quadrupedal bulkier fully-terrestrial Protoceratops-like plant eater. Depending on a species, Jeholoceratops ranged from about the size of a Mesozoic Protoceratops to about the size of two or three rhinoceroses. It is unknown on why Jeholoceratops had became extinct, but it was once thought that competition from mammal herbivores outcompeted them or mammal predators overhunted them to extinction, but as new evidence confirmed, these weren't the causes, instead, it was most likely climate changes that drove Jeholoceratops to extinction.