Two new corticolous species, Hafellia alisioae and H. gomerana (lichenized Ascomycetes, Physciaceae), collected from twigs of coastal shrubs on the Canary Islands are described. The new species are discussed in relation to other Hafellia species with similar characters. An overview and a key for 23 corticolous species of Hafellia with 2-celled ascospores is provided.

Seven Neofuscelia species have been identified from Italy. A key to the species is provided and the distinguishing morphological and chemical characters, distribution, ecology, substratum preference and interrelationships of each are discussed. Neofuscelia perrugata is new to Italy. N. pyrenaica is new to Greece and Cyprus. New data on the distribution and ecology of N. perrugata, N. delisei and N. luteonotata are presented and these are consistent with their taxonomic rank.

The new species Ochrolechia splendens Lumbsch and Messuti, is described from Mexico, south-western North America, where it occurs on exposed siliceous rocks. It is characterized by relatively large apothecia with entire margins, the presence of the gyrophoric acid chemosyndrome in the thallus and apothecial disc and the presence of lichexanthone as major components.

Studies of type specimens and other specimens of Menegazzia subsimilis and M. dissecta have shown that they are referable to the same taxon. Thus, M. dissecta is reduced to synonymy with M. subsimilis, which is characterized by lacerate soralia protruding from lobe apices or vertical lobules (protuberances), small perforations and the presence of the stictic acid complex in the medulla. It has 2-spored asci. The synonymy implies that M. subsimilis has a much wider distribution range than previously known. It is reported here from Oceania (Hawaii, Solomon Islands), Asia (Japan, Papua New Guinea, Russia), Europe (Austria, Germany, Portugal), South America (Ecuador, Peru), the Caribbean (Dominican Republic, Jamaica) and North America (Canada, USA).

Hueidea australiensis Kantvilas & P.M. McCarthy gen. et sp. nov. (Fuscideaceae) is described from seasonally inundated, granite rocks in the Mt Kosciuszko area of New South Wales, Australia. The genus is characterized by the crustose habit, a green unicellular photobiont of the type found in the Fuscideaceae, Teloschistes-type, eight-spored asci, non-adhering, simple paraphyses and polarilocular, hyaline ascospores. Its systematic position is discussed, based on a comparative study of a range of related or superficially similar taxa from the Teloschistaceae and Fuscideaceae.