1. Experimental Phycology and Culture Collection of Algae, University of Göttingen, D-37073 Göttingen, Germany
2. Culture Collection of Algae and Protozoa, Scottish Association for Marine Science, Oban, Argyll, PA37 1QA, UK
3. Research Department for Limnology Mondsee, University of Innsbruck, A-5310 Mondsee, Austria