1. Department of Biological Sciences, 3149 Wood Hall, 1903 West Michigan Avenue, Western Michigan University, Kalamazoo, MI 49008-5410, USA
2. Department of Genetics, Rutgers University, Nelson Biological Laboratories, 604 Allison Road, Piscataway, NJ 08854-8082, USA
3. Universite de Lausanne, IE-ZEA, Batiment de Biologie, CH-1015, Lausanne, Switzerland
4. Department of Biology, University of Rochester, Rochester, NY 14627, USA
5. Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Republic of Panama