1. Department of Biological Sciences, University of Cincinnati, PO Box 210006, Cincinnati, Ohio 45221, U.S.A.;
2. Wakayama Prefectural Museum of Natural History, 370-1 Funo, Kainan-shi, Wakayama 642-0001, Japan
3. Kitakyushu Museum of Natural History & Human History, 2-4-1 Higashida, Yahatahigashi-ku, Kitakyushu, Fukuoka 805-0071, Japan
4. Department of Geology and Mineralogy, Graduate School of Science, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
5. Royal Saskatchewan Museum, T. rex Discovery Centre, P.O. Box 460, Eastend, Saskatchewan S0N 0T0, Canada
6. Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada
7. Department of Biological Sciences and Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada