LIAS light – Item Descriptions
LIASlight ItemID: 7439
Rhizocarpon arctogenum Gelting
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Americas – North America (incl Mexico) | Arctic |
| substrate: | rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | crustose (crustaceous) – episubstratal – unspecified |
| thallus: | compartimentized – areolate, squamulate |
| [th] upper surface: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | black(ish) brown |
| [th upper surface]: | pruinose |
| [th upper surface] pruina: | scarce, sparse, fine |
| [th marginal and upper surface] specific structures: | absent |
| [th] morphol substructures (eg areoles, lobes, branches) width [mm]: | (low) 0.4 (high) 0.8 |
| [th] morphol substructures (eg areoles, squamules): | discontiguous, dispersed (throughout the thallus) |
| [th] morphol substructures (eg areoles, lobes, branches) upper surface: | verrucose, warted |
| ascomata: | absent | present |
| ascoma: | apothecial, apothecioid – hymenial |
| ascoma [mm]: | (low) 1.0 (high) 10.0 (max) 13.0 |
| ascoma: | subsessile, subimmersed, adnate, semi-immersed, emergent | sessile, superficial |
| [ascm, if apoth] disc, mazaedium: | subconvex, slightly convex | convex |
| [ascm, if apoth] disc, mazaedium: | black(ish) |
| [ascm, if apoth] disc, mazaedium: | epruinose |
| [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: | black(ish) |
| [ascm, if apoth] margin excipular photobionts: | absent |
| [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: | black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | brown(ish) black |
| [ascm] paraphyses/-oids: | present |
| [ascm] paraphyses/-oid cells width [µm]: | (median) 2.0 |
| [ascm] paraphyses/-oid apical cells width [µm]: | (low) 3.0 (high) 4.0 |
| [ascm] epihymenium, epithecium: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | red(dish) blue (violet) |
| asci: | lecanoralean |
| [asc] tholus: | thickened |
| [asc] tholus amyloidity (iodine reaction): | present |
| [asc] tholus amyloidity pattern: | with amyloid cap (= Icmadophila-, Lecidea-, Pertusaria-types etc) |
| ascospores: | (low) 4.0 (high) 5.0 |
| [asp] shape: | ellipsoidal | oblong, oblong-obtuse |
| [asp] length [µm]: | (low) 30.0 (high) 46.0 |
| [asp] width [µm]: | (low) 14.0 (high) 20.0 |
| [asp] septa: | present |
| [asp] septa: | muriformly septate – muriform, submuriform |
| [asp] pigmentation: | medium brown, brownish | dark brown |
| [asp] perispore, epispore: | thick, distincly halonate |
| secondary metabolites: | absent | present |
| secondary metabolites: | gyrophoric acid |
| primary photobiont: | present |
| secondary photobionts (eg in cephalodia): | absent |
| primary photobiont: | chlorophytaceous – trebouxiaceous, chlorococcoid |