The volume presents a detailed and illustrated (many high quality microcraphs and drawings) study of lichenicolous fungi collected in Isla Navarino (S Chile) and surroundings has resulted in 696 parasited lichen samples, representing 240 taxa of lichenicolous fungi. In this paper 189 species are reported. Six new genera are described: Atronectria gen. nov., similar to Pronectria but with brown, K+ blackish green ascomata; Macrographa gen. nov., with large ascomata and three septate spores of unknown affinities; Pseudostigmidium gen. nov., related to Stigmidium, but generally with I+ red hymenium and 3-septate spores, with five species living on Pseudocyphellaria and Nephroma; Sarcoexcipula gen. nov. of thick and complex perithecial wall and large and septate ascospores; Umbilithecium gen. nov., Arthonia similar genus with diferent hymenial structure and simples spores and Umushamyces gen. nov. similar in habitus to Arthonia but with Biatora or Bacidia-type asci. sp. nov. on Nephroma antarcticum; Merismatium coccotremicola sp. nov. on Coccotrema cucurbitula and perhaps Cladonia; Microsphaeropsis lichenicola sp. nov. on Pannaria and Hypotrachyna; Minutoexcipula beaglei sp. nov. on Lecanora sp. (sterile); Muellerella antarctica sp. nov. on Hypogymnia antarctica and Pannoparmelia; Nanostictis nephromatis sp. nov. on Nephroma antarcticum; Nectriopsis silvaustralis sp. nov. on Pseudocyphellaria vaccina; Neobarya darwiniana sp. nov. on Nephroma antarcticum; Niesslia yaganae sp. nov. on Nephroma antarcticum; Odontotrema navarinoi sp. nov. probably on a terricolous lichen: Micarea magellanica; Phaeosporobolus minutus sp. nov. on Coccotrema and Pertusaria; Phoma rozziana sp. nov. on Pseudocyphellaria guillemini; Plectocarpon gayanum sp. nov. on cf. Siphula; Polycoccum longisporum sp. nov. on Pseudocyphellaria freycinetii, Ph. guilleminii, Nephroma antarcticum and Pannaria sp.; Pronectria fragmospora sp. nov. on Usnea; Pronectria invisibilis sp. nov. on Nephroma antarcticum; Pronectria occulta sp. nov. on Usnea; Protothelenella pseudocyphellariae sp. nov. on Pseudocyphellaria freycinetii; Pseudostigmidium biseptatum sp. nov. on Pseudocyphellaria freycinetii; Pseudostigmidium confusum sp. nov. on Pseudocyphellaria glabra; Pseudostigmidium disparatum sp. nov. on Pseudocyphellaria endochrysa and Ps. vaccina; Pseudostigmidium fumosum sp. nov. on Pseudocyphellaria lechleri and Ps. hillii; Rhagadostoma pannariae sp. nov. on Pannaria farinosa and P. pallida; Sarcoexcipula pannariae sp. nov. on Pannaria; Sclerococcum areolatum sp. nov. on Xylographa?; Scoliciosporum pseudocyphellariae sp. nov. on Pseudocyphellaria vaccina and Ps. coriifolia; Skyttea violacea sp. nov. on Tephromela sp. (sorediate); Sphaerellothecium pannariacearum sp. nov. on thallus of Pannaria farinosa and P. pallida, Stigmidium disconephromeum sp. nov. on the ascomatal disc of Nephroma antarcticum; Stigmidium spegazzinii sp. nov. on Pseudocyphellaria freycinetii; Taeniolella pseudocyphellariae sp. nov. on Pseudocyphellaria hillii; Toninia ualae sp. nov. on Pseudocyphellaria coriifolia and Nephroma antarticum; Trichonectria australis sp. nov. on Usnea and Menegazzia; Umbilithecium pseudocyphellariae sp. nov. on Pseudocyphellaria crocata; Umushamyces kuturnum sp. nov. on Coccotrema cucurbitula; Unguiculariopsis hispidula sp. nov. on Psoroma hispidulum; Unguiculariopsis macrocarpa sp. nov. on Pseudocyphellaria crocata; Xenonectriella aurantiaca sp. nov. on Pseudocyphellaria vaccina; Xenonectriella humilis sp. nov. on Pseudocyphellaria freycinetii and Ps. faveolata and Xenonectriella rosea sp. nov. on corticolous species of Pannaria, Parmeliella and Psoroma. Furthermore, the following new combinations are proposed: Niesslia peltigericola (D.Hawksw.) Etayo [= Wentiomyces peltigericola]; Niesslia tatjanae (Kondratyuk) Etayo [Wentiomyces tatjanae]; Opegrapha reactiva (Alstrup & D.Hawksw.) Etayo & Diederich [= Kalaallia reactiva]; Pseudostigmidium nephromiarium (Lindsay) Etayo [= Microthelia nephromiaria]; Scoliciosporum albidulum (Willey in Tuck.) Etayo [= Biatora albidula]; Stigmidium alectoriae (Lindsay) Etayo [= Microthelia alectoriae] y Xenonectriella leptaleoides (Etayo) Etayo [= Pronectria leptaleoides]. Kalaallia Alstrup & D. Hawksw. is proposed as a synonym of Opegrapha; Arthonia minuta is proposed as a new synonym of A. muscigena, and Scutula nephromatis a species newly combined in Etayo & Rosato (2008), is described. Morphological, taxonomical, ecological and chorological information is provided for many species when necessary. This work enlarges the area of distribution of many of these species to the southern hemisphere, South America, Argentina or Chile.weiterlesen