LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 3679

Melanelia stygia (L.) Essl.

Characters[*]:Character States[*]:
global occurrence: Eurasia – Asia Extratropical | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic
substrate: rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: foliose (foliaceous), leaf-like
thallus: continuous, diffuse, effuse
[th] upper surface: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | green(ish) brown (olive brown)
[th upper surface]: epruinose
[th marginal and upper surface] specific structures: absent | present
[th margin] cilia, cilioid structures: absent
[th upper surface] isidia, isidioid structures: absent
[th upper surface] soredia, soralia, soralioid structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.5 (high) 2.0 (max) 3.0
[th] morphol substructures (eg areoles, squamules): distantly discontiguous
[th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | pseudocyphellate, with pseudocyphellae
[th] morphol substructures (eg lobes, branches): subdichotomous | irregular
[th] lower surface: black(ish)
[th lower surface] specific structures: present
[th lower surface] rhizines, rhizoid structures: present
[th lower surface] rhizines, rhizinoid structures: unbranched, simple | furcately branched, furcate, forked | irregularly branched, irregular
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (median) 5.0 (max) 8.0
ascoma: sessile, superficial | subpedicellate, substipitate, subpedunculate, substalked
[ascm, if apoth] disc, mazaedium: concave | plane, flat, flattened, expanded
[ascm, if apoth] disc, mazaedium: brown(ish) (if pale: fawn, tan; if mid: cinnamon)
[ascm, if apoth] disc, mazaedium: epruinose
[ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | green(ish) brown (olive brown)
[ascm, if apoth] margin excipular photobionts: present | abundant
[ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: hyaline, colourless
[ascm] paraphyses/-oids: present
[ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon)
asci: lecanoralean
[asc] tholus: thickened
[asc] tholus amyloidity (iodine reaction): present
[asc] tholus amyloidity pattern: amyloid with widening axial body towards the apex (= Lecanora-, Parmelia-, Rinodina-types etc)
ascospores: (median) 8.0
[asp] shape: subglobose, subspherical | broadly ellipsoidal | ellipsoidal
[asp] length [µm]: (low) 7.0 (high) 10.5
[asp] width [µm]: (low) 4.5 (high) 6.0
[asp] septa: absent – spore lumen unilocular, monolocular
[asp] pigmentation: hyaline, colourless
[asp] perispore, epispore: not apparent
conidiomata: absent | present
conidia: bifusiform
[co] length [µm]: (low) 3.5 (high) 5.5
secondary metabolites: absent | present
secondary metabolites: caperatic acid | fumarprotocetraric acid | protocetraric acid | unknown/unidentified fatty acid(s)
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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