William G. Parker
Division of Resource Management
Petrified Forest National Park
Box 2217
Petrified Forest, AZ, 86028

Bill Parker is a vertebrate paleontologist from northeastern Arizona specializing in Late Triassic archosaurs, especially the Aetosauria. He has earned B.S. and M.S. degrees from Northern Arizona University and has been employed as a paleontologist by the National Park Service at Petrified Forest National Park since 2001. Bill is also a research associate at the Museum of Northern Arizona and adjunct faculty at Northland Pioneer College. Prior to ths he worked as a paleontologist for the U.S. Forest Service in the North Horn Formation (Late Cretaceous/Paleocene) of central Utah. His most recent publications have focused on a new reconstruction of the aetosaur Desmatosuchus and a revision of the genus, a phylogenetic analysis of the Aetosauria, and analyzing morphological change in aetosaur osteoderms by position to create accurate reproduction hypotheses for less completely known taxa, as well as several papers on the Late Triassic dinosaur record of North America. Bill is currently working on a detailed description of the pseudosuchian Revueltosaurus callenderi, which previously was believed to represent an ornithischian dinosaur.