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Catillaria contristans (Nyl.) Zahlbr.
Family: Catillariaceae
[Bacidia dufourei (Ach. ex Nyl.) Lettau,  more]
Catillaria contristans image

Global occurrence: Antarctic – Antarctica | Oceania – Australasia | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic | Antarctic – Southern Subpolar Islands, Subantarctic Islands.  Substrate: soil, clay, humus, turf, detritus, dead leaves | bryophytes – mosses, liverworts | rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: crustose (crustaceous) – episubstratal – unspecifiedthallus: granular, granulose, granulate | compartimentized – areolate, squamulate; [th] upper surface: grey(ish) | green(ish) grey | white(ish) grey | grey(ish) brown; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.05 (high) 0.3 (max) 0.5; [th] morphol substructures (eg areoles, lobes, branches) upper surface: granulose, granular | verruculose, minutely warted.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (low) 0.2 (high) 0.6 (max) 1.0; [ascm, if apoth] disc, mazaedium: convex | distinctly convex | strongly convex, hemispherical, (sub-)globose; [ascm, if apoth] disc, mazaedium: black(ish); [ascm, if apoth] disc, mazaedium: epruinose; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | hyaline, colourless | blue(ish) black | red(dish) brown (if pale: orange brown); [ascm] paraphyses/-oids: present; [ascm] paraphyses/-oid cells width [µm]: (low) 1.7 (high) 2.3 (max) 3.0; [ascm] epihymenium, epithecium: green(ish) | brown(ish) green (olivaceous, olive green).  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 (max) 16.0; [asp] shape: ellipsoidal | ovoid, ovate; [asp] length [µm]: (low) 9.0 (high) 16.5; [asp] width [µm]: (low) 2.5 (high) 4.5; [asp] septa: absent – spore lumen unilocular, monolocular | present; transversely septate; [asp] transversal septa: (median) 1.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Conidiomata: absent | present.  Conidia: bacilliform, bacillary; [co] length [µm]: (low) 3.5 (high) 4.0.  Secondary metabolites: absent.  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.