An isolated skull of a procolophonid is described from the Owl Rock Member of the Chinle Formation in the Abajo Mountains of southeast Utah. Although poorly preserved, this specimen exhibits features that demonstrate a phylogenetic relationship with leptopleuronine procolophonids. These include the dentition, the greatly expanded orbitotemporal opening, the prominent quadratojugal spikes, and the shape of the jugal.
Nicholas C. Fraser. Virginia Museum of Natural History, Martinsville, Virginia 24112, USA.
Randall B. Irmis. Department of Geology, Northern Arizona University, Flagstaff, Arizona 86011, USA. *Current address: University of California Museum of Paleontology, 1101 Valley Life Sciences Building, Berkeley, California 94720-4780.
David K. Elliott. Department of Geology, Northern Arizona University, Flagstaff, Arizona 86011, USA.
KEY WORDS: Procolophonidae; Parareptilia; Late Triassic; Chinle Formation
PE Article Number: 8.1.13
Copyright: Society of Vertebrate Paleontology. May 2005
Submission: 28 June 2004. Acceptance: 6 March 2005.