1. Centre for Geobiology, Department of Earth Science, University of Bergen, PO Box 7803, 5020 Bergen, Norway
2. Bjerknes Centre for Climate Research, University of Bergen, PO Box 7803, 5020 Bergen, Norway
3. Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, PO Box 1066, Blindern, 0316 Oslo, Norway
4. Natural History Museum, University of Oslo, PO Box 1172 Blindern, 0318 Oslo, Norway