Life habit: lichenized (mutualistic with algal photobionts) thallus: foliose (foliaceous), leaf-like thallus: continuous, diffuse, effuse [th] upper surface: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | grey(ish) black [th upper surface]: epruinose [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.2 (high) 1.0 [th] morphol substructures (eg areoles, squamules): contiguous, coherent (throughout the thallus) [th] lower surface: black(ish) [th lower surface] specific structures: present [th lower surface] rhizines, rhizoid structures: absent ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (median) 5.0 ascoma: sessile, superficial [ascm, if apoth] disc, mazaedium: brown(ish) black [ascm, if apoth] disc, mazaedium: epruinose [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | grey(ish) black [ascm] epihymenium, epithecium: hyaline, colourless asci: lecanoralean ascospores: (median) 8.0 [asp] shape: globose, spherical | ellipsoidal [asp] length [µm]: (low) 7.5 (high) 10.0 [asp] width [µm]: (low) 5.0 (high) 7.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless conidiomata: absent | present conidia: bifusiform | clavate | bacilliform, bacillar [co] length [µm]: (low) 4.5 (high) 6.0 secondary metabolites: present secondary metabolites: alectorialic acid | barbatolic acid | unknown/unidentified compound(s) primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified.