page_title: Placerias
section_title: Discovery
hierarchical_section_title: Placerias / Discovery
caption_attribution_description: English: Placerias hesternus, a dicynodont from the Late Triassic of North America. Digital.
context_page_description: Placerias is an extinct genus of dicynodonts that lived during the late Carnian age of the Triassic Period. Placerias belongs to a group of dicynodonts called Kannemeyeriiformes, which was the last known group of dicynodonts before dicynodonts became extinct at the end of the Triassic.
context_section_description: Fossils of forty Placerias were found near St. Johns, southeast of the Petrified Forest in the Chinle Formation of 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. Sedimentological features of the site indicate a low-energy depositional environment, possibly flood-plain or overbank. Bones are associated mostly with mudstones and a layer that contains numerous carbonate nodules. It is also known from the Pekin Formation of North Carolina.
  Placerias was originally considered the last of the Dicynodonts until fossil finds from Queensland were reported in 2003 to have revealed that the Dicynodonts survived until the Early Cretaceous. Agnolin et al. (2010) called for a reconsideration of that Australian specimen, noting its similarity to baurusuchian crocodyliforms such as Baurusuchus pachecoi.
caption: Restoration of a herd
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