1. Department of Biology, University of Oslo, P.O. Box 1066 Blindern, N-0316 Oslo, Norway
2. Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, P.O. Box 1066 Blindern, N-0316 Oslo, Norway
3. Mycothèque de l’Université Catholique de Louvain, Faculté des Sciences Agronomiques, 1348 Louvain-la-Neuve, Belgium