approximately between 155 and 150 million years ago

el Kritosaurus navajovius vivía en un mundo peligroso

meaning it had a large

Being a stegosaurus

Como otros ceratopsianos

Synthetoceras tricornatus Escala:1:35 approximately between 155 and 150Synthetoceras tricornatus was an extinct artiodactyl mammal belonging to Protoceratidae, an exclusively North American family of ungulates that has no living representatives. It lived during the Late Miocene of North America and is particularly well represented in Clarendonian faunas from the southern United States, with important records from Texas and other regions of the Great Plains. Although its general appearance may superficially resemble that