Anne Sofie Søndergaard, Aarhus University, Aarhus C, Denmark, Nicolaj K Larsen, University of Aarhus, Aarhus, Denmark, Jesper Olsen, Aarhus University, Aarhus, Denmark, Kurt Henrik Kjaer, Natural History Museum, Copenhagen, Denmark and Svend Funder, Geological Museum – University of Copenhagen, Copenhagen, Denmark