Bursatella leachi de Blainville, 1817 (Mollusca: Opisthobranchia: Aplysiomorpha) nel Golfo di Cagliari: prime segnalazioni per i mari circostanti la Sardegna

Several specimens of Bursatella leachi de Blainville, Opisthobranch lessepsian immigrant, were collected in two different occasions (october 2001, september 2006) in the Gulf of Cagliari (Southern Sardinia, Western Mediterranean Sea). These are the first records in the seas around Sardinia and the most westerly records in the Mediterranean Sea.