Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified [th] upper surface: black(ish) | green(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) [th upper surface]: epruinose [th marginal and upper surface] specific structures: absent ascomata: absent | present ascoma: perithecial, perithecioid – hymenial ascoma [mm]: (low) 0.2 (high) 0.4 ascoma: sessile, superficial [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) [ascm] paraphyses/-oids: absent asci: fissitunicate – verrucarialean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent ascospores: (median) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (low) 8.0 (high) 12.0 [asp] width [µm]: (low) 5.5 (high) 7.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent secondary metabolites: absent primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

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