LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 6146

Thelomma ocellatum (Körb.) Tibell

Characters[*]:Character States[*]:
global occurrence: Eurasia – Europe | Americas – North America (incl Mexico) | Arctic
substrate: wood – dead, living | bark, cork, plant surface – trunks, branches, twigs
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – episubstratal – unspecified
thallus: compartimentized – areolate, squamulate
[th] upper surface: grey(ish)
[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 | present
[th upper surface] soredia, soralia, soralioid structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 1.5 (high) 2.0 (max) 2.5
[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 – mazaedial
ascoma [mm]: (low) 0.5 (high) 1.0
ascoma: immersed, innate
[ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded
[ascm, if apoth] disc, mazaedium: black(ish)
[ascm, if apoth] disc, mazaedium: epruinose | pruinose
[ascm, if apoth] disc, mazaedium pruina: scarce, sparse, fine | dense
[ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: grey(ish)
[ascm, if apoth] margin excipular photobionts: present | abundant
[ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: black(ish) brown
[ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon)
asci: prototunicate
[asc] tholus: not thickened
[asc] tholus amyloidity (iodine reaction): absent
ascospores: (median) 8.0
[asp] shape: ellipsoidal
[asp] length [µm]: (low) 22.0 (high) 28.0
[asp] width [µm]: (low) 12.0 (high) 15.0
[asp] septa: present
[asp] septa: transversely septate
[asp] transversal septa: (median) 1.0
[asp] pigmentation: medium brown, brownish | dark brown
[asp] perispore, epispore: ornamented, rough, warted, striate, cracked
secondary metabolites: absent | present
secondary metabolites: atranorin | epanorin | norstictic acid | rhizocarpic acid | usnic 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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