Contributions to the knowledge of lichenicolous fungi growing on baeomycetoid lichens andIcmadophila, with a key to the species

Abstract

AbstractFive species of lichenicolous fungi are described as new to science:Buelliella ohmuraeZhurb. & Diederich (onIcmadophila), with a non-granulose epihymenium, not or only slightly enlarged, pale brown apical cells of paraphysoids and 1-septate, smooth ascospores;Catillaria japonicaZhurb. & Hafellner (onDibaeisandPseudobaeomyces), with a medium to dark reddish brown epihymenium, exciple and hypothecium, rather frequently branched and anastomosed paraphyses with only slightly enlarged apical cells without a dark cap, andCatillaria-type asci;Cryptodiscus ihleniiZhurb. (onDibaeis), with persistently immersed ascomata, non-amyloid asci and hymenium, not or only slightly enlarged apical cells of paraphyses and narrowly obovate, 1-septate ascospores;Llimoniella chilensisZhurb. (onDibaeisand a sterile microsquamulose lichen), with a K+ green exciple and epihymenium and aseptate, broadly ellipsoid ascospores; andStigmidium phyllobaeidisZhurb., Etayo & Flakus (on apothecial discs ofPhyllobaeis), with a hemiamyloid interascal gel, not previously reported in that genus, well-developed, 1‒2(‒4)-celled periphysoids, elongate asci and hyaline, 1-septate ascospores. An undescribed species ofArthonia(onPseudobaeomyces) is briefly characterized.Sphaerellothecium coniodesis newly reported for Asia. A key to the 32 species of lichenicolous fungi and lichens known to occur on baeomycetoid lichens andIcmadophilais provided.