1. Ghent University, Biology Department, Protistology and Aquatic Ecology, Krijgslaan 281 S8, B-9000 Ghent, Belgium
2. Experimental Phycology and Sammlung von Algenkulturen, University of Göttingen, Nikolausberger Weg 18, D-37073 Göttingen, Germany
3. Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
4. STD, Ghent University, Biology Department, K.L. Ledeganckstraat 35, B-9000 Ghent, Belgium