1. The Arctic University Museum of Norway, UiT–The Arctic University of Norway, 9006 Tromsø, Norway.
2. Aquatic Ecology Unit, Department of Biology, Lund University, Sölvegatan 37, 22362 Lund, Sweden.
3. Natural History Museum of Denmark, University of Copenhagen, Gothersgade 130, 1123 Copenhagen, Denmark.
4. Department of Bioscience, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark.
5. Marine Biological Section, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark.
6. Marine Biological Section, University of Copenhagen, Universitetsparken 4, 2100 Copenhagen Ø, Denmark.