Also known as Trilophosaurus dornorum holotype site

Where: Arizona (34.9° N, 109.8° W: paleocoordinates 10.5° N, 48.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Sonsela Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• "PFV 191 is within the Jim Camp Wash beds of the Sonsela Member and is located

•approximately 20 meters above the top of the Blue Mesa Member...The exact age of these beds cannot be currently unequivocally constrained, but the presence of the aetosaur Paratypothorax and the phytosaur Pseudopalatus at lower horizons in the nearby Crystal Forest (PFV 173) and Mountain Lion Mesa (PFV 295), respectively, suggests a Norian age"

•

•Kent et al. 2019: Sonsela member falls between magneto zones PF5n and PF4n (roughly 216.16–213.44Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; gray, sandy mudstone

Size class: macrofossils

Collected by R. Irmis & J. Shuman in 2003

Collection methods: surface (float),

Primary reference: B. D. Mueller and W. G. Parker. 2006. A new species of Trilophosaurus (Diapsida: Archosauromorpha) from the Sonsela Member (Chinle Formation) of Petrified Forest National Park, Arizona. In W. G. Parker, S. R. Ash & R. B. Irmis (eds.), A Century of Research at Petrified Forest National Park, 1906-2006: Geology and Paleontology. Museum of Northern Arizona Bulletin 62:119-125 [R. Butler/R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88329: authorized by Richard Butler, entered by Richard Butler on 07.04.2009

Creative Commons license: CC BY (attribution)