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Caloplaca aractina (Fr.) Häyrén (redirected from: Caloplaca fuscoatra)
Family: Teloschistaceae
[Biatorina viridirufa (Ach.) Hazsl.,  more]
Caloplaca aractina image

Global occurrence: Eurasia – Europe.  Substrate: rock – calcareous, calciferous, basic.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: crustose (crustaceous) – episubstratal – unspecified; thallus: cracked, fissured, fractured, rimose; [th] upper surface: grey(ish) | grey(ish) black | green(ish) grey; [th marginal and upper surface] specific structures: absent.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (median) 0.8 (max) 1.0; [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded; [ascm, if apoth] disc, mazaedium: red(dish) | black(ish) red | brown(ish) red (carneous).  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] length [µm]: (low) 11.0 (high) 15.0; [asp] width [µm]: (low) 6.0 (high) 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, unknown/unidentified anthraquinone(s).  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.