1Department of Anatomical Sciences, Stony Brook University, Stony Brook, New York 11794-8081, USA; E-mail: moleary@mail.som.sunysb.edu 2Department of Biology, Spieth Hall, University of California, Riverside, California 92521, USA; E-mail: johnga@citrus.ucr.edu 3Division of Paleontology, American Museum of Natural History, 79th Street at Central Park West, New York, New York 10024-5192, USA; E-...