1. Department of Paleobiology; National Museum of Natural History, Smithsonian Institution; P.O. Box 37012 (MRC-121) Washington, D.C. 20013-7012 U.S.A.
2. Department of Entomology; University of Maryland; College Park Maryland 20742 U.S.A.
3. Department of Palaeontology; National Museum; Václavské nám. 68 Prague 1 Czech Republic
4. Natal Museum; Private Bag 9070 Pietermaritzburg 3200 South Africa
5. School of Biological and Conservation Sciences; University of KwaZulu-Natal; Private Bag X01 Scottsville 3209 South Africa
6. Paleontological Institute; Russian Academy of Sciences; 123 Profsoyuznaya Str. Moscow 117997 Russia