Rinodinais a widespread, polyphyletic genus of crustosePhysciaceaewithc. 300 species worldwide. A major missing link in understanding its global biogeography has been eastern Asia where the genus has never been systematically revised. Here we review specimen and literature records forRinodinafor north-eastern Asia (Russian Far East, Japan and the Korean Peninsula) and recognize 43 species. We describe two species,R. hypobadiaandR. orientalis, as new to science.Rinodina hypobadiais distinguished by its pigmented hypothecium,Dirinaria-type ascospores and pannarin in both thallus and epihymenium.Rinodina orientalisis characterized by its erumpent apothecia that remain broadly attached, with discs sometimes becoming convex and excluding the thalline margins, ascospores belonging to thePhyscia-type and secondary metabolites absent. Nine other species are reported from the region for the first time. These includeR. dolichospora,R. freyi,R. metaboliza,R. sicula,R. subminutaandR. willeyi. Of particular biogeographical interest are three additional new records that have western North American–eastern Asian distributions: the corticolous speciesR. endospora,R. macrosporaandR. megistospora. Six species have the better known eastern North American–eastern Asian distributions:R. ascociscana(syn.R. akagiensis,R. melancholica),R. buckii,R. chrysidiata,R. subminuta,R. tenuis(syn.R. adirondackii) andR. willeyi, and two have eastern North American–eastern Asian–European distributions:R. excrescensandR. moziana(syn.R. destituta,R. vezdae). Our study begins to close one of the largest gaps in our knowledge of circumboreal species distributions inRinodinaand, together with previous studies in North America and Europe, provides new insights into circumboreal crustose lichen biogeography.Rinodina cinereovirens(syn.R. turfaceavar. cinereovirens) is also reported as new to North America.

The presented work is based on the study of extensive material collected by Ezhkin A. K. in 2014-2018 from the islands of Kunashir, Iturup, Paramushir, and Shikotan. As a result of the study, the new list of species of the genus Rinodina for the Kuril Islands consists of 17 taxa. One species, Rinodina herrei H. Magn., is new to northeastern Asia and Russia, 14 taxa are new to the Kuril Islands. The genus Rinodina is represented by species with disjunctive distribution by 35.3 % (6 species). They are divided into two groups:

A molecular phylogeny based on ITS1/ITS2 and mtSSU DNA sequences is presented for lichen-forming fungi in Protoparmeliopsis and its distant relative Sedelnikovaea gen. nov. The positions of the two genera in the phylogenetic tree of the families Lecanoraceae and Lecideaceae are discussed. The new combination Sedelnikovaea baicalensis (≡ Lecanora baicalensis) is proposed. The unique Sedelnikovaea-type ascus is described and illustrated. Sedelnikovaea baicalensis and Zwackhiomyces zarei are for the first time recorded from China.

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