Global occurrence: Oceania – Australasia | Eurasia – Europe | Americas – North America (incl Mexico) | Americas – South and Central America | Arctic. Substrate: soil, clay, humus, turf, detritus, dead leaves. Life habit: lichenized (mutualistic with algal photobionts). Thallus: fruticose (fruticous), shrub-like, beard-like; [th] upper surface: white(ish) | grey(ish) white; [th upper surface]: epruinose; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 1.0 (high) 2.0 (max) 8.0; [th] morphol substructures (eg areoles, squamules): distantly discontiguous; [th] morphol substructures (eg lobes, branches): irregular. Ascomata: absent. Secondary metabolites: present, baeomycesic acid | squamatic acid. Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid. Secondary photobionts (eg in cephalodia): absent.