Olaf R. P. Bininda-Emonds,1,2 John L. Gittleman,3 and Mike A. Steel4 1Current address: Lehrstuhl für Tierzucht, Technical University of Munich, D-85354 Freising-Weihenstephan, Germany; email: [email protected] 2Institute of Evolutionary and Ecological Sciences, Leiden University, Kaiserstraat 63, 2300 RA Leiden, The Netherlands 3Department of Biology, Gilmer Hall, University of Virg...