Author Affiliations +
ELIZABETH L. NICHOLLS
Royal Tyrrell Museum of Palaeontology, P.O. Box 7500, Drumheller, Alberta, Canada. T0J 0Y0 betsy.nicholls@gov.ab.ca
MAKOTO MANABE
National Science Museum, Japan, 3–23–1 Hyakunin-cho, Shinjuku-ku, Tokyo 169–0073 Japan, manabe@kahaku.go.jp