Eleven new species of crustose lichenized fungi from the Falkland Islands (Islas Malvinas)

Abstract

AbstractEleven new species of crustose, lichenized fungi are described from the Falkland Islands (Islas Malvinas). Nine species are saxicolous, whereasLecania vermisporaoccurs on the stems ofHebe ellipticaandTephromela lignicolais lignicolous on fence posts. The new species are:Bacidia marina, with a sordid blue-green K−, N+ violet epihymenium and acicular, multiseptate ascospores;B. pruinata, with pruinose apothecia and multiseptate ascospores;Buellia gypsyensis, with a thallus containing 5-O-methylhiascic acid and withAmandinea-type conidia;Cliostomum albidum, with pruinose apothecia lacking pigments;C. longisporum, with long narrow ascospores (c.20 × 3 µm);Coccotrema rubromarginatum, with a placodioid thallus having a red-brown margin and lower surface;Hymenelia microcarpa, with minute, immersed apothecia (<0·1 mm diam.) and a trebouxioid photobiont;Lecania vermispora, with vermiform, 3–6 septate ascospores;Lepra argentea, with papillate isidia with dark caps;Rhizocarpon malvinae, which is similar toR. reductumbut with a grey thallus, generally sessile apothecia with a thick raised margin and often with the Cinereorufa-green pigment in the epithecium and upper exciple; andTephromela lignicola,a sterile, sorediate species on fence posts. Most of these species are reported only from the Falkland Islands althoughCoccotrema rubromarginatumis also reported from Isla de los Estados and Isla Grande de Tierra del Fuego, Argentina. Ascoconidia are reported fromLepra argenteaand cephalodia fromPertusaria pachythallina.Keys to the species reported from the Falkland Islands in the genera of the newly described species are also provided.