1. Istituto Sperimentale Talassografico, CNR, Spianata San Raineri 86, 98122 Messina, Italy
2. Dipartimento di Biologia Animale ed Ecologia Marina, Università di Messina, Salita Sperone 31, 98166 Messina, Italy
3. Department of Microbiology, GBF – German Research Center for Biotechnology, Mascheroder Weg 1, 38124 Braunschweig, Germany
4. Institute of Microbiology, Biozentrum, Technical University of Braunschweig, Spielmannstr. 7, 38106 Braunschweig, Germany