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Biatora ocelliformis (Nyl.) Arnold
Family: Ramalinaceae
Biatora ocelliformis image
Laurens Sparrius  

Global occurrence: Eurasia – Europe | Americas – North America (incl Mexico) | Arctic.  Substrate: bark, cork, plant surface – trunks, branches, twigs.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified; granular, granulose, granulate | cracked, fissured, fractured, rimose | compartimentized – areolate, squamulate; [th] upper surface: grey(ish) | white(ish) | green(ish) grey | brown(ish) yellow (ochraceous, ochre) | white(ish) brown (beige); th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.15 (high) 0.4; [th] morphol substructures (eg areoles, lobes, branches) upper surface: rugulose, finely wrinkled.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (min) 0.25 (low) 0.45 (high) 0.85 (max) 1.15; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex | convex | distinctly convex | strongly convex, hemispherical, (sub-)globose; [ascm, if apoth] disc, mazaedium: black(ish) | grey(ish) | blue(ish) black | green(ish) black | brown(ish) grey | grey(ish) brown; [ascm, if apoth] disc, mazaedium: epruinose; [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: grey(ish); [ascm, if apoth] margin excipular photobionts: absent; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | hyaline, colourless | greenish hyaline; [ascm] paraphyses/-oids: present; [ascm] epihymenium, epithecium: blue(ish) | blue(ish) green (turquoise) | brown(ish) green (olivaceous, olive green).  Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: amyloid with acuate axial body towards the apex (= Bacidia-, Buellia-, Ramalina-types etc).  Ascospores: (median) 8.0; [asp] shape: ellipsoidal | elongate-fusiform, ellipsoidal-fusiform | narrowly ellipsoidal; [asp] length [µm]: (min) 7.5 (low) 9.7 (high) 14.2 (max) 20.0; [asp] width [µm]: (min) 2.5 (low) 2.8 (high) 4.2 (max) 4.5; [asp] septa: absent – spore lumen unilocular, monolocular | present; transversely septate; [asp] transversal septa: (median) 0.0 (max) 1.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Secondary metabolites: present, argopsin.  Primary photobiont: present; chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.