LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 14242

Rhizocarpon reductum Th. Fr.

Characters[*]:Character States[*]:
global occurrence: Oceania – Australasia | Eurasia – Europe | Americas – North America (incl Mexico) | Antarctic – Southern Subpolar Islands, Subantarctic Islands
substrate: rock – siliceous, siliciferous, acidic
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)
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.2 (high) 0.4
[th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | subsquamulose
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (min) 0.2 (low) 0.4 (high) 0.6 (max) 0.8
ascoma: immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent | sessile, superficial
[ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex | convex | distinctly convex
[ascm, if apoth] disc, mazaedium: black(ish)
[ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish)
[ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon)
[ascm] paraphyses/-oids: present
[ascm] paraphyses/-oid cells width [µm]: (median) 1.0
[ascm] epihymenium, epithecium: brown(ish) green (olivaceous, olive green)
asci: lecanoralean
[asc] tholus: thickened
[asc] tholus amyloidity (iodine reaction): present
[asc] tholus amyloidity pattern: with amyloid cap (= Icmadophila-, Lecidea-, Pertusaria-types etc)
ascospores: (median) 8.0
[asp] length [µm]: (min) 17.0 (low) 18.3(median) 21.6 (high) 25.0 (max) 30.0
[asp] width [µm]: (min) 8.0 (low) 9.5(median) 10.8 (high) 12.0 (max) 13.5
[asp] septa: present
[asp] septa: muriformly septate – muriform, submuriform
[asp] transversal septa: (low) 4.0 (high) 6.0
[asp] pigmentation: hyaline, colourless
[asp] perispore, epispore: thick, distincly halonate
secondary metabolites: absent | present
secondary metabolites: norstictic 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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