Temporal range: Late Carnian to Norian ~230–218 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
[1]
Skeleton
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Clade:
Synapsida
Clade:
Therapsida
Suborder:
†Anomodontia
Clade:
†Dicynodontia
Family:
†Stahleckeriidae
Subfamily:
†Placeriinae
Genus:
†Placerias Lucas, 1904
Species:
†P. hesternus
Binomial name
†Placerias hesternus
Lucas, 1904
Placerias (meaning 'broad body')[2] is an extinct genus of dicynodonts that lived during the Carnian to the Norian age of the Triassic Period (230–220 million years ago). Placerias belongs to a group of dicynodonts called Kannemeyeriiformes, which was the last known group of dicynodonts before the taxon became extinct at the end of the Triassic.
^Kent, Dennis V.; Olsen, Paul E.; Lepre, Christopher; Rasmussen, Cornelia; Mundil, Roland; Gehrels, George E.; Giesler, Dominique; Irmis, Randall B.; Geissman, John W.; Parker, William G. (October 16, 2019). "Magnetochronology of the Entire Chinle Formation (Norian Age) in a Scientific Drill Core From Petrified Forest National Park (Arizona, USA) and Implications for Regional and Global Correlations in the Late Triassic" (PDF). Geochemistry, Geophysics, Geosystems. 20 (11). American Geophysical Union: 4654–4664. Bibcode:2019GGG....20.4654K. doi:10.1029/2019GC008474. S2CID 207980627.
^Paleofile. "Page on Placerias". Retrieved 20 February 2010.
water would also have given Placerias some protection against land-based predators such as Postosuchus.[citation needed] Placerias used its beak to slice through...
closely resembles other Triassic stahleckeriids, such as its close relative Placerias from North America. It was a heavily built quadruped with a rotund, barrel-shaped...
University of California, Berkeley. He took part in excavations at the Placerias Quarry in 1930 and the Shonisaurus discoveries of 1954 and later, in what...
Petrified Forest Formation of the Late Triassic Chinle Group, found at the Placerias Quarry at St. Johns, Arizona, has been identified as one of Uatchitodon...
Geographic Channel under the name Life After Dinosaurs. Adelobasileus Placerias Desmatosuchus Coelophysis Stegosaurus Allosaurus Supersaurus Laolestes...
currently only known from a few isolated osteoderm remains collected at the Placerias Quarry and Petrified Forest National Park. Each of these localities, which...
Placerias, but had a tall, narrow sagittal crest rising sharply from behind the eyes instead of a broad flat intertemporal region. Unlike Placerias,...
tusks. It is regarded as larger than its later, more famous relative Placerias, which weighed over 800–1,000 kilograms (1,800–2,200 lb).[citation needed]...
United States. The holotype specimen UCMP 34498 was discovered in the Placerias quarry of the Bluewater Creek Formation of Arizona, from the Norian stage...
largest known phytosaurs) suggests that it hunted large prey such as Placerias. Below is a cladogram from Stocker (2012): Long, R. A., and Murry, P....
ecosystem and preyed on herbivores in the uplands like the dicynodont Placerias. The fauna found in Dockum Group confirm that there were lakes and/or...
in the Triassic, attacks the Placerias herd, and wounds one individual; the herd scatters, leaving the wounded Placerias to the Postosuchus. Early pterosaurs...
claimed it was a sister taxon of Placerias, as previously mentioned, whereas others claimed it was merely a synonym of Placerias and that they were one and...
Formation of the southwestern United States, and to include Coelophysis, Placerias and Postosuchus in the storyline. However, during production the sequence...
Dicynodonts are extremely rare despite being abundantly represented at the Placerias Quarry near St. Johns. Fossil invertebrates include freshwater snails...
Johns, Arizona fit this general time period as well. The fossiliferous Placerias quarry, previously regarded as belonging to an older subunit, is likely...
W. (2021). "A new short-faced archosauriform from the Upper Triassic Placerias/Downs' quarry complex, Arizona, USA, expands the morphological diversity...
especially the Chinle Formation of Petrified Forest National Park and the Placerias Quarry in Arizona, the Garita Creek Formation of central New Mexico (the...
Robert Long and Phillip Murry described new fossils of Poposaurus from the Placerias quarry in the Chinle Formation of Arizona. Among the new material were...
type locality for species †Pinna †Placenticeras – tentative report †Placerias †Placerias hesternus †Platananthus †Platananthus hueberi – type locality for...
drepanosaurids (Reptilia, Diapsida) from the Late Triassic (Adamanian Placerias Quarry, Arizona, USA) and the stratigraphic range of the Drepanosauridae"...
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