Life habit: lichenized (mutualistic with algal photobionts) thallus: peltate, umbilicate thallus: continuous, diffuse, effuse [th] upper surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon) [th upper surface]: epruinose [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, squamules): distantly discontiguous [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | uneven, undulate [th] lower surface: black(ish) [th lower surface] specific structures: present [th lower surface] rhizines, rhizoid structures: present [th lower surface] rhizines, rhizinoid structures: unbranched, simple | irregularly branched, irregular ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 2.0 (high) 5.0 ascoma: sessile, superficial | subpedicellate, substipitate, subpedunculate, substalked [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex [ascm, if apoth] disc, mazaedium: black(ish) [ascm, if apoth] disc, mazaedium: epruinose [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) [ascm, if apoth] margin excipular photobionts: absent [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) [ascm] paraphyses/-oids: present [ascm] paraphyses/-oid cells width [µm]: (median) 2.4 [ascm] paraphyses/-oid apical cells width [µm]: (low) 2.4 (high) 4.8 [ascm] epihymenium, epithecium: black(ish) | brown(ish) black asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): present [asc] tholus amyloidity pattern: entirely amyloid (= Catillaria-, Teloschistes-types etc) ascospores: (low) 6.0 (high) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (low) 30.0 (high) 50.0 [asp] width [µm]: (low) 20.0 (high) 26.5 [asp] septa: present [asp] septa: muriformly septate – muriform, submuriform [asp] pigmentation: medium brown, brownish [asp] perispore, epispore: not apparent secondary metabolites: present secondary metabolites: gyrophoric acid primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: rock – siliceous, siliciferous, acidic.