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Ochrolechia xanthostoma (Sommerf.) K. Schmitz & Lumbsch
Family: Ochrolechiaceae
[Aspicilia poriniformis (Nyl.) Arnold,  more]
Ochrolechia xanthostoma image
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: cracked, fissured, fractured, rimose | compartimentized – areolate, squamulate [th] upper surface: grey(ish) | grey(ish) white [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) upper surface: verrucose, warted ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 0.05 (high) 0.1 [ascm, if apoth] disc, mazaedium: red(dish) | yellow(ish) brown [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | red(dish) [ascm] paraphyses/-oids: present [ascm] epihymenium, epithecium: red(dish) brown (pale: orange brown) asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): present [asc] tholus amyloidity pattern: with amyloid cap (= Icmadophila-, Lecidea-, Pertusaria-types etc) ascospores: (median) 4.0 [asp] length [µm]: (low) 55.0 (high) 75.0 (max) 85.0 [asp] width [µm]: (low) 30.0 (high) 40.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless | pale brown [asp] perispore, epispore: not apparent secondary metabolites: present secondary metabolites: alectoronic acid | lichesterinic acid primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: bark, cork, plant surface – trunks, branches, twigs | rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified.