Placerias (name meaning "Broad Body") is a genus of dicynodont, a stem-mammal-like reptile, that originated during the Late Triassic period in what is now North America.

In the Series 2 premiere "Birth of a New Blood", a number of 10 Placerias were brought back to the park from Late Triassic Arizona, 225 million years ago.


Era & DiscoveryEdit

Placerias lived during the Late Triassic period, around 225–212 million years ago, living alongside the flying reptiles and the early dinosaurs. Before the Triassic, there were once various different species of these powerful creatures existing across the world. But, eventually, Placerias became one of the last representatives of their kind that remained in the Triassic. Therefore, they had become an endangered species. 

Though first discovered in 1904, fossils of forty Placerias were found near St. Johns, southeast of the Petrified Forestin Arizona. This site has become known as the 'Placerias Quarry' and was discovered in 1930, by Charles Camp and Samuel Welles, of the University of California, Berkeley. 

Physical AttributesEdit

Measuring up to 10 feet (3 m) long and weighing 1–2 tons (2,000–4,000 lbs.), Placerias were large and magnificent mammal-like reptiles not at all related to dinosaurs. These quadruped beasts had beak-like mouths and tusks on their faces. They are instead a much more ancient species of reptile called synapsids, distant relatives of the modern mammals and their ancestors.

Behavior & TraitsEdit

Placerias traveled in large herds and, like Toxodon, were said to behave like modern hippos, spending much of its time during the wet season wallowing in the water, chewing at plants near riverside.

Despite their fearsome appearance, Placerias were in fact gentle herbivores. Their tusks were used for digging up roots. However, for two angry and jousting males, these tusks could be used as lethal weapons. In the heat and dry season, Placerias spread out over scrubland to feed. When in danger, Placerias moved desperately slow.


Trivia Edit

  • The sound effects of Placerias are that rhino, cow, bull, walrus, and hippo.
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