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Pertusaria oculata (Dickson) Th. Fr.
Family: Pertusariaceae
[Isidium oculatum (Dicks.) Ach.,  more]
Pertusaria oculata image
André Aptroot  
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: continuous, diffuse, effuse [th] upper surface: white(ish) grey [th marginal and upper surface] specific structures: present [th margin] cilia, cilioid structures: absent [th upper surface] isidia, isidioid structures: present [th upper surface] soredia, soralia, soralioid structures: absent ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 1.0 (high) 2.0 [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex [ascm, if apoth] disc, mazaedium: black(ish) [ascm, if apoth] disc, mazaedium: epruinose [ascm] paraphyses/-oids: present 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) 8.0 [asp] length [µm]: (min) 16.0 (low) 23.0 (high) 28.0 (max) 30.0 [asp] width [µm]: (low) 10.0 (high) 14.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent conidiomata: absent | present [co] length [µm]: (median) 3.5 secondary metabolites: present secondary metabolites: fumarprotocetraric acid | gyrophoric acid | protocetraric acid primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: soil, clay, humus, turf, detritus, dead leaves | rock, stones, pebbles – unspecified.