1. School of Anatomical Sciences; University of the Witwatersrand; Parktown 2193 Johannesburg South Africa
2. The Oceans Institute; The University of Western Australia; Crawley Western Australia 6009 Australia
3. School of Animal Biology; The University of Western Australia; Crawley Western Australia 6009 Australia
4. Queensland Brain Institute; The University of Queensland; Santa Lucia Queensland 4072 Australia
5. Faculty of Sciences; University of Kisangani; B.P. 1232 Kisangani Democratic Republic of the Congo
6. Department of Anthropology; University of Arkansas; Fayetteville Arkansas 72701
7. Department of African Zoology; Royal Museum for Central Africa; B-3080 Tervuren Belgium
8. Laboratory of Histology and Neuropathology; Free University of Brussells; B-1070 Brussels Belgium