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Caloplaca exsecuta (Nyl.) Dalla Torre & Sarnth.
Family: Teloschistaceae
Caloplaca exsecuta image
life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified thallus: compartimentized – areolate, squamulate [th] upper surface: grey(ish) [th upper surface]: epruinose [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, squamules): discontiguous, dispersed (throughout the thallus) [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | granulose, granular ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 0.3 (high) 0.5 ascoma: sessile, superficial [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded [ascm, if apoth] disc, mazaedium: black(ish) red | yellow(ish) red (orange red) | brown(ish) red (carneous) [ascm, if apoth] disc, mazaedium: epruinose [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) [ascm, if apoth] margin excipular photobionts: present | sparse [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) [ascm] paraphyses/-oids: present [ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | brown(ish) yellow (ochraceous, ochre) | yellow(ish) brown asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): present [asc] tholus amyloidity pattern: entirely amyloid (= Catillaria-, Teloschistes-types etc) ascospores: (median) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (low) 11.0 (high) 15.5 [asp] width [µm]: (low) 5.5 (high) 7.0 (max) 8.0 [asp] septa: absent | present – spore lumen bilocular, polarilocular, plurilocular [asp] septa: transversely septate [asp] transversal septa: (median) 1.0 [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent secondary metabolites: present secondary metabolites: emodin | fallacinal | parietin | parietinic acid | xanthorin primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

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