The current view of the geographical ranges of lichens is often distorted by overly narrow or overly broad applications of names and by insufficient survey of most regions of the world. Here we present several cases where species of Teloschistaceae formerly thought to be limited to rather small territories in the western or eastern parts of Eurasia are in fact widespread in northern Eurasia. We support our findings with ITS nrDNA data in several new trees showing relationships in the genera Athallia, Calogaya, Caloplaca, Flavoplaca and Gyalolechia. The widespread species have little in common, except that most of them reproduce both sexually and asexually, and we discuss the possible influence of the combined reproduction on geographical range. Calogaya bryochrysion, Calogaya saxicola, Gyalolechia epiphyta and Gyalolechia ussuriensis are new combinations. Calogaya alaskensis is a younger synonym for C. bryochrysion. The generally arctic-alpine Calogaya bryochrysion also occurs on the bark of solitary trees in dry parts of the Altai Mountains. The Australian Flavoplaca cranfieldii is a younger synonym of F. flavocitrina. Gyalolechia epiphyta has been described numerous times, from different regions and substrata, as Caloplaca juniperi, C. laricina, C. tarani, Gyalolechia arizonica and G. juniperina. The name Gyalolechia xanthostigmoidea has recently been used for G. epiphyta, but it represents a distinct taxon. Gyalolechia ussuriensis is closely related to and morphologically indistinguishable from G. persimilis, but they have a different ecology and distribution and we regard them as distinct species. Caloplaca juniperina Tomin is lectotypified.

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Fifty five species of lichens and lichenicolous fungi are reported from the Southern Ural (Republic of Bashkortostan and Chelyabinsk Region). Graphis betulina, Micarea micrococca, and Ramonia chrysophaea are reported for the first time in Russia. Abrothallus microspermus, Arthopyrenia grisea, Biatora pontica, Collema ligerinum, Puttea margaritella, Rinodina granulans, Rinodina malangica, Syzygospora physciacearum and Xylographa trunciseda are new to Ural Region. Calicium glaucellum, Chaenotheca gracillima, Microcalicium disseminatum, Parmeliella triptophylla, Ramalina obtusata and Sphaerellothecium reticulatum are new to Southern Ural. 21 species are new to the Republic of Bashkortostan and the Chelyabinsk Region, and 50 species are reported for the first time from the protected areas of the Southern Ural. Brief comments on the most interesting species and their ecology (habitat and substrate preferences) and chorology are given. Fig 1. Landscape around Nurgush Mountain range. Foto S. A. Gorodilov.

Summary. The paper presents findings of 15 lichenized and lichen-allied species rarely recorded in southern Siberia and in Russia in general. All of them were collected for the first time on the territory of the Baikal Reserve (Southern Pribaikal'e, Mts. Khamar-Daban

A taxonomic and biogeographic overview of the genusMyrionorais provided. Two species are recognized,M. albidula(Willey) R. C. Harris andM. pseudocyphellariae(Etayo) S. Ekman & Palice comb. nov. The genus is characterized by polysporous asci, the presence of crystals in the hymenium and proper exciple that partly consist of lobaric acid, and a photobiont with large cells (mostly in the range 12–20 µm).Myrionora albidulais currently known from Germany, Norway, Sweden, the Russian Federation (Altayskiy Kray, Chelyabinskaya Oblast', Khabarovskiy Kray and Zabaykal'skiy Kray), and the United States (Alaska, Connecticut, Maine and Massachusetts). It inhabits bark of deciduous trees and shrubs and conifers over a wide range of latitudes.Myrionora pseudocyphellariaeis known from Chile and Ecuador, where it has been encountered on lichens and decaying bark. Based on morphological characteristics, we conclude thatMyrionorabelongs in theRamalinaceae.