CALOPLACA-GLOMERATA, A NEW CALCICOLOUS LICHEN SPECIES FROM SWEDEN

A new lichen species, Caloplaca glomerata Arup, is described from the islands of Oland and Gotland, southeastern Sweden, where it occurs on calcareous rocks, stones and stone walls. The new species has unique Physicia-like spores which it shares with only one other species, viz. Caloplaca latzelii (Serv.) Clauz. & Roux. This mediterranean species differs from C. glomerata in the structure of the thallus, and the arrangement and size of the apothecia. The new species differs from morphologically similar taxa in the C. velana group in the unique spores, arrangement of the apothecia and to some degree in the ecology. A description of C. latzelii is provided and a lectotype is selected for this taxon.