Bulletin no. 8 Dr. Robert D. McCord and Debra Boaz, eds. Bulletin no. 8 was produced following the 2001 combined meeting of the Western Association of Vertebrate Paleontologists (WAVP) and the Southwest Paleontological Society (SPS) hosted by the Mesa Southwest Museum. The scope of papers and abstracts in this volume reflects the breadth of paleontological research undertaken in the western United States. 143 pages. Western Association of Vertebrate Paleontologists with Mesa Southwest Museum and Southwest Paleontological Society: First Meeting of the New Millenium Proceedings volume Mesa Southwest Museum Bulletin No. 8 Table of Contents In Search of Clues: Solving the Mystery of a 375 Million Year Old Mass‐Kill Heidemarie G. Johnson An Update on New Reptile Material from the Holbrook Member, Upper Moenkopi Formation, Northern Arizona Sterling Nesbitt Stratigraphy, Biostratigraphy and Biochronology of Lower Chinle Group (Adamanian: Latest Carnian) Vertebrate Fossil Assemblages in the Vicinity of St. Johns, Arizona Andrew B. Heckert, and Spencer G. Lucas A Germanic‐Aspect Phytosaur from the Upper Triassic Sonsela Sandstone (Chinle Group: Petrified Forest Formation), Petrified Forest, Arizona Adrian P. Hunt, Spencer G. Lucas and Andrew B. Heckert An Enigmatic Aetosaur Specimen from the Upper Triassic Dockum Formation of Texas William G. Parker New Specimens of Dilophosaurus wetherilli (Dinosauria: Theropoda) from the Early Jurassic Kayenta Formation of Northern Arizona Robert Gay Protosuchid Crocodylomorphs from the Lower Jurassic Navajo Sandstone of North‐Central Arizona L. F. Rinehard, A. B. Heckert, S. G. Lucas, G. Bryant, and R. Cushman The Demise of Dystylosaurus edwini and a Revision of Supersaurus vivianae Brian Curtice and Ken Stadtman The Pectoral Girdle of the Sauropod Dinosaur Apatosaurus Philip R. Platt The Relative Abundance of the Sauropoda (Dinosauria, Saurischia) of the Morrison Formation and Implications for late Jurassic Paleoecology of North America John R. Foster A Preliminary Report of New Fossils from the Schellenberger Canyon Formation (Upper Lower Cretaceous) of Southern Arizona, USA Gregory P. Cranwell Age and Correlation of Cretaceous Fossil Vertebrates from Southeastern Arizona Spencer G. Lucas and Andrew B. Heckert Vertebrate Localities and Assemblages of the Bisbee Group of Southern Arizona John‐Paul Hodnett Preliminary Statistical Characterization of a Zuniceratops Bone Bed from the Middle Cretaceous (Turonian) Moreno Hill Formation Douglas G. Wolfe, Steve Beekman, Dan Mcguiness and Thomas Robira Ongoing Research in the Late Cretaceous Fort Crittenden Formation, Southeastern Arizona Robert Mccord, Gavin Mccullough, Robert Scarborough, and B. J. Tegowski Dinosaur Nesting Site in the Maastrichtian North Horn Formation, Central Utah Rose Difley New Records of Plesiosauria from the Cretaceous of Southern Utah L. Barry Albright, David D. Gillette, Alan L. Titus and Merle H. Graffam Investigating the Correlation of Stratigraphy and Fossil Taxa in the Fort Crittenden Fauna using GIS Erin Schirtzinger “Aublysodon” Teeth from the El Gallo Fm. (Late Campanian) of Baja California: The Southernmost Record of Tyrannosaurid Theropods Tracy L. Ford and D. J. Chure Patterns of Mammalian Evolution across the Cretaceous‐Tertiary Boundary William A. Clemens The Earliest Known Echolocating Toothed Whales (Mammalia: Odontceti): Preliminary Observations of Fossils from Washington State. Lawrence G. Barnes, James L. Goedert and Hitoshi Furusawa Naticid Valve Preference and Species Selectivity on Plio‐Pleistocene Mollusks Kathleen Mcfadden, Jeffrey G. Agnew and Carol M. Tang A Robust Wolverine (Plesiogulo?) from Northeastern Utah Larry D. Agenbroad and Chauncie Todd Recent Discoveries at the 111 Ranch Fossil Locality, Safford, AZ Andria L. Skaff New Fossil Records from the Blancan 111 Ranch Beds, Graham County, Arizona: Results of Cooperative Efforts by a Federal Agency, Public and Private Museums, and the Amateur Community Robert Mccord, Lawrence Thrasher, Richard White, B.J. Tegowski, Andria Skaff, Gavin McCullough, and Erin Schirtzinger. Bison and Late Pleistocene Megafauna from the Mojave Desert Eric Scott and Shelley M. Cox Equine Navicular Syndrome: A Historical Perspective on a Modern Problem Mary E. T. Flint, Lennart C. Ostblom and Gregory H. McDonald Paleopathology of a Specimen of the Latest Miocene “Pseudo‐Walrus”, Gomphotaria pugnax from Coastal Southern California. Lawrence G. Barnes, Howell W. Thomas and Rodney E. Raschke The Importance of Landfills on Paleontology and the Need for Expediting the Removal of Fossils Jacques Grabe .