The circum-Sicilian islands as important refuge areas for some remarkable bryophytes

In this paper, the occurrence of some interesting species in the circum-Sicilian islands Linosa and Pantelleria is reported. The species from Linosa are: Pseudocrossidium obtusulum (Lindb.) H. A. Crum & L. E. Anderson, second report from Sicily and Italy, and Gymnostomum lanceolatum M. J. Cano, Ros & J. Guerra, second report from Sicily and third one from Italy. The species from Pantelleria are: Campylopus brevipilus Bruch & Schimp., which is newly recorded in Sicily and southern Italy, Calymperes erosum Mull. Hal. and Trematodon longicollis Michx., whose range is extended. The occurrence of numerous chorologically significant species at Linosa and Pantelleria contributes to the consideration of these islands as Important Plant Areas.