1. S. D. Sampson, Department of Anatomy, New York College of Osteopathic Medicine of New York Institute of Technology, Old Westbury, NY 11568, USA.
2. L. M. Witmer, Department of Biomedical Sciences, College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA.
3. C. A. Forster, D. W. Krause, P. M. O'Connor, Department of Anatomical Sciences, State University of New York, Stony Brook, NY 11794, USA.
4. P. Dodson, Laboratories of Anatomy, Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
5. F. Ravoavy, Université d'Antananarivo, Service de Paléontologie, Antananarivo (101), Madagascar.