LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 5498

Rhizocarpon geminatum Körb.

Characters[*]:Character States[*]:
global occurrence: Antarctic – Antarctica | Eurasia – Europe | Americas – North America (incl Mexico) | Americas – South and Central America | Arctic
substrate: rock – siliceous, siliciferous, acidic | rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – episubstratal – unspecified
thallus: cracked, fissured, fractured, rimose | compartimentized – areolate, squamulate
[th] upper surface: grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | grey(ish) brown
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.2(median) 0.5 (high) 0.6
[th] morphol substructures (eg areoles, lobes, branches) upper surface: verrucose, warted
[th] medulla amyloidity: absent
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (low) 0.4(median) 0.6 (high) 1.0
ascoma: sessile, superficial
[ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex | convex
[ascm, if apoth] disc, mazaedium: black(ish)
[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: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | brown(ish) black | black(ish) brown
[ascm] paraphyses/-oids: present
[ascm] epihymenium, epithecium: brown(ish) black | red(dish) brown (pale: orange brown)
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) 1.0 (high) 2.0
[asp] shape: broadly ellipsoidal
[asp] length [µm]: (low) 42.0(median) 53.0 (high) 68.0
[asp] width [µm]: (low) 18.0(median) 24.0 (high) 28.0
[asp] septa: present
[asp] septa: muriformly septate – muriform, submuriform
[asp] transversal septa: (low) 3.0 (high) 10.0
[asp] pigmentation: medium brown, brownish | dark brown
[asp] perispore, epispore: thick, distincly halonate
secondary metabolites: present
secondary metabolites: norstictic acid | rhizocarpic acid | stictic acid
primary photobiont: present
secondary photobionts (eg in cephalodia): absent
primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid

[*] Not all (synonymous, equivalent or similar) terms being provided in parallel for a character or character state (e.g. 'endosubstratal, inconspicuous, immersed') need to be valid for the taxon under concern.


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