ACKNOWLEDGMENTS
Bob and Penny Tyson discovered this new fauna and the authors are grateful for their bringing it to our attention. Discussions with K. Angielczyk, T. Kemp, S. Ray, and S. Bandyopadhyay were extremely helpful and we thank many colleagues who supplied literature relevant to this paper. K. Angielczyk, B. Rubidge, M. Maisch, and an anonymous reviewer, and the editor, B. Rubidge, greatly improved this paper. The photographs for and were taken by S. Cuthbert and the figures were prepared with the assistance of P. Robinson and B. Martin.
Handling editor: Bruce Rubidge