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È stata battezzata “Italienische Bergzikade” (Cicadetta sibillae) e l’ha scoperta un gruppo di ricercatori dell’Università di Basilea. L’insetto, che fa parte del gruppo di dieci specie di cicale in Svizzera, si distingue soprattutto per i suoni che emette: veloci, ad alto volume e all’interno di uno schema ritmico molto complesso.
In Ticino si contano una dozzina di colonie, come pure nel canton Grigioni, in Mesolcina. La maggior parte degli esemplari si concentra nella flora del Monte San Giorgio.
Gli habitat preferiti dal nuovo trovato, che canta tra la vegetazione bassa, sono pascoli soleggiati con abbondanti cespugli e boschi di latifoglie. “Nel nord Appennino la Cicadetta sibillae è un insetto comune”, ha detto Thomas Hertach, dottorando all'Università di Basilea e autore della scoperta.
ats/pix
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