Published online by Cambridge University Press: 28 March 2007
Abrothallus secedens Wedin & R. Sant. sp. nov., commensalistic on species of Pseudocyphellaria, from Argentina and Kenya and Abrothallus granulatae Wedin sp. nov., parasitic on Pseudocyphellariagranulata, from Argentina (Tierra del Fuego) are described. Vouauxiomycesgranulatae Wedin sp. nov., is regarded as the anamorph of A. granulatae. Sphaerellothecium minutum Hafellner is recorded for the first time from Antarctica and South America, Phaeosporobolus alpinus R. Sant., Alstrup & D. Hawksw. from Antarctica and Argentina, Arthonia epiphyscia Nyl., Dacampia rufescentis (Vouaux) D. Hawksw., Polycoccum pulvinatum (Eitner) R. Sant. And Stigmidium pumilum (Lettau) Matzer & Hafellner from South America and Nesolechia oxyspora (Tul.) Massal. and Pyrenidium actinellum Nyl. from Chile.