Diminutive metoposaurid skulls from the Upper Triassic Blue Hills (Adamanian:latest Carnian) of Arizona

ASU Author/Contributor (non-ASU co-authors, if there are any, appear on document)
Andrew B. Heckert Ph.D., Assistant Professor of Geology (Creator)
Institution
Appalachian State University (ASU )
Web Site: http://www.library.appstate.edu/

Abstract: We describe two tiny metoposaurid specimens from the lower part of the Chinle Group in the Blue Hills of east-central Arizona. The more complete of these specimens is an incomplete skull anterior to the orbits (45 mm preorbitallength) and numerous skull roof and palate fragments. The less complete specimen is a 25-mm-long skull roof fragment surrounding the left orbit. Based on the sutural relationships of the skull bones anterior to the orbit, we identify the more complete specimen as a juvenile of Buettneria perfecta Case, 1922 and tentatively identify the less complete specimen as Apachesaurus gregorii Hunt, 1993. These fossils are particularly important because they indicate that cranial sutures do not change significantly during metoposaurid ontogeny.

Additional Information

Publication
Zanno, L.E., Heckert, A.B., Krzyzanowski, S.E., and Lucas, S.G., (2002) Diminutive metoposaurid skulls from the Upper Triassic Blue Hills (Adamanian:latest Carnian) of Arizona. New Mexico Museum of Natural History and Science Bulletin 21, p. 121-125. (ISSN 1524-4156) Archived in NC DOCKS with permission of the editor. The version of record is available at: http://econtent.unm.edu/
Language: English
Date: 2002