1. The Scottish Association for Marine Science, Culture Collection for Algae and Protozoa, Scottish Marine Institute, Oban, Argyll PA37 1QA, UK
2. Aberdeen Oomycete Laboratory, Institute of Medical Sciences, University of Aberdeen, Foresterhill, AB25 2ZD, UK
3. Fachbereich Biologie, Universität Konstanz, D-78457 Konstanz, Germany