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Caloplaca nivalis (Korber) Th. Fr.
Family: Teloschistaceae
[Biatorina nivalis (Körb.) Th. Fr.,  more]
Caloplaca nivalis image
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: continuous, diffuse, effuse [th] upper surface: grey(ish) [th marginal and upper surface] specific structures: absent ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (median) 0.7 ascoma: sessile, superficial [ascm, if apoth] disc, mazaedium: concave | plane, flat, flattened, expanded | subconvex, slightly convex [ascm, if apoth] disc, mazaedium: red(dish) yellow (orange, orange yellow) [ascm, if apoth] disc, mazaedium: pruinose [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: grey(ish) [ascm, if apoth] margin excipular photobionts: present [ascm] paraphyses/-oids: present [ascm] paraphyses/-oid cells width [µm]: (low) 1.0 (high) 3.0 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: narrowly ellipsoidal [asp] length [µm]: (low) 25.0 (high) 30.0 [asp] width [µm]: (low) 3.0 (high) 5.0 [asp] septa: absent | present – spore lumen bilocular, polarilocular, plurilocular [asp] septa: transversely septate [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent secondary metabolites: absent primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: bryophytes – mosses, liverworts | rock – siliceous, siliciferous, acidic.