Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed [th] upper surface: white(ish) | brown(ish) grey [th marginal and upper surface] specific structures: absent ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (median) 0.5 ascoma: immersed, innate [ascm, if apoth] disc, mazaedium: black(ish) | blue(ish) black [ascm] paraphyses/-oids: present asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent ascospores: (median) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (min) 10.0 (low) 14.0 (high) 20.0 [asp] width [µm]: (low) 8.0 (high) 13.0 [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 – trentepohliaceous, trentepohlioid.

substrate: rock – calcareous, calciferous, basic.