Capronia thamnoliae, Cercidospora thamnoliae and Cercidospora thamnoliicola are reported new to Japan; Endococcus thamnoliae new to Papua New Guinea; Merismatium thamnoliicola new to Norway; Polycoccum vermicularium new to Argentina, Australia, Colombia, Japan, Nepal and Papua New Guinea; Sphaerellothecium thamnoliae var. taimyricum new to Nepal; S. thamnoliae var. thamnoliae new to Australia, Falkland Islands, Japan and Papua New Guinea; Sphaeropezia santessonii new to Japan; Stigmidium frigidum new to Japan; Thamnogalla crombiei new to Australia, Bhutan, India, Japan, Nepal, North Korea and Papua New Guinea. Cornutispora ciliata is newly reported from Thamnolia. Material of Polycoccum vermicularium is shown to be morphologically heterogeneous. Keywords. – Biodiversity, biogeography, lichenicolous mycobiota.