1. Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, DK-2100, Denmark
2. Fossil and Mo-clay Museum, Museum Mors, Skarrehagevej 8, Nykøbing Mors, DK7900, Denmark
3. Norwegian College of Fishery Science, UiT—The Arctic University of Norway, Tromsø, Norway
4. Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35, I-10125 Torino, Italy,