1. Embrapa Recursos Genéticos e Biotecnologia Brasília DF 70770‐901 Brazil
2. Departamento de Botânica Universidade de Brasília Brasília DF 70919‐970 Brazil
3. Department of Anthropology Smithsonian Institution National Museum of Natural History Washington DC 20560 USA
4. Centro de Ciências Agrárias Ambientais e Biológicas Universidade Federal do Recôncavo da Bahia Cruz das Almas BA 44380‐000 Brazil
5. Laboratories for Analytical Biology Smithsonian Institution National Museum of Natural History Washington DC 20560 USA
6. Department of Anthropology Washington University in St Louis St Louis MO 63130 USA
7. School of Life Sciences University of Warwick Coventry CV4 7AL UK