Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified thallus: continuous, diffuse, effuse [th] upper surface: white(ish) | yellow(ish) grey | grey(ish) white [th marginal and upper surface] specific structures: absent ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 0.3 (high) 0.6 [ascm, if apoth] disc, mazaedium: strongly concave, excavate, urceolate | concave [ascm, if apoth] disc, mazaedium: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | grey(ish) brown | red(dish) brown (if pale: orange brown) [ascm] paraphyses/-oids: present [ascm] paraphyses/-oid cells width [µm]: (low) 0.8 (high) 1.0 [ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon) asci: unitunicate [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent ascospores: (min) 4.0 (low) 6.0 (high) 8.0 [asp] shape: broadly ellipsoidal [asp] length [µm]: (min) 17.0 (low) 20.0 (high) 30.0 (max) 35.0 asp] width [µm]: (min) 10.0 (low) 12.0 (high) 15.0 [asp] septa: present [asp] septa: muriformly septate – muriform, submuriform [asp] transversal septa: (min) 3.0 (low) 5.0 (high) 6.0 (max) 9.0 [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: thick, distincly halonate secondary metabolites: absent primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: rock – calcareous, calciferous, basic.