The authors wish to thank Mehrez Gammoudi (Tunis) for making the collection of samples possible in Tunisia. The research benefited from a grant by the Italian Ministry of Research (MIUR PRIN-2007 ‘Approccio integrato all’identificazione dei Proseriati’, and from the ‘Centro di Eccellenza’ of the University of Sassari.
Received: 18 March 2009
Accepted: 4 August 2009
Published online: 16 October 2009
Editor: R. Sluys