LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 4782

Placidium rufescens (Ach.) Breuss

Characters[*]:Character States[*]:
global occurrence: Africa (incl Madagascar) | Eurasia – Asia Extratropical | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic
substrate: soil, clay, humus, turf, detritus, dead leaves | bryophytes – mosses, liverworts | lichens, lichenized fungi | rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: squamulose (squamulous) | foliose (foliaceous), leaf-like
thallus: continuous, diffuse, effuse
[th] upper surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | red(dish) brown (if pale: orange brown)
[th upper surface]: epruinose
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 6.0 (high) 10.0 (max) 15.0
[th] morphol substructures (eg areoles, squamules): contiguous, coherent (throughout the thallus)
[th] morphol substructures (eg areoles, lobes, branches) upper surface: squamulose
[th] lower surface: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon)
[th lower surface] specific structures: present
[th lower surface] rhizines, rhizoid structures: present
ascomata: absent | present
ascoma: perithecial, perithecioid – hymenial
ascoma [mm]: (min) 0.55
ascoma: immersed, innate
[ascm] paraphyses/-oids: absent
asci: fissitunicate – verrucarialean
[asc] tholus: not thickened | thickened
[asc] tholus amyloidity (iodine reaction): absent
ascospores: (median) 8.0
[asp] shape: broadly ellipsoidal | ellipsoidal
[asp] length [µm]: (min) 14.0 (low) 15.0(median) 17.8 (high) 20.0 (max) 22.0
[asp] width [µm]: (min) 6.0 (low) 7.5(median) 7.9 (high) 9.0 (max) 11.0
[asp] septa: absent – spore lumen unilocular, monolocular
[asp] pigmentation: hyaline, colourless
[asp] perispore, epispore: not apparent
conidiomata: absent | present
conidia: ellipsoidal | oblong, oblong-obtuse
[co] length [µm]: (low) 3.0(median) 3.7 (high) 5.0
secondary metabolites: absent
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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