Global occurrence: Eurasia – Europe | Arctic. Substrate: bark, cork, plant surface – trunks, branches, twigs. Life habit: lichenized (mutualistic with algal photobionts). Thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed; [th marginal and upper surface] specific structures: absent. Ascomata: absent | present; ascoma: perithecial, perithecioid – hymenial; ascoma [mm]: (median) 0.3. Asci: fissitunicate – bitunicate; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): absent. Ascospores: (median) 8.0; [asp] length [µm]: (low) 15.0 (high) 22.0; [asp] width [µm]: (low) 5.0 (high) 7.0; [asp] septa: present, transversely septate; [asp] transversal septa: (median) 3.0; [asp] pigmentation: hyaline, colourless. Secondary metabolites: absent. Primary photobiont: present; chlorophytaceous – trentepohliaceous, trentepohlioid. Secondary photobiont (eg in cephalodia): absent.