1. Department of Zoology, Institute of Biosciences, University of São Paulo, Rua do Matão, São Paulo, Brazil
2. Department of Earth, Atmospheric and Planetary Sciences, Massachussetts Institute of Technology, Cambridge, MA, USA
3. Laboratory of Soil Biology, University of Neuchatel, Neuchatel, Switzerland
4. Jardin Botanique de Neuchâtel, Neuchatel, Switzerland