LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 6114

Thelidium pyrenophorum (Ach.) Mudd.

Characters[*]:Character States[*]:
global occurrence: Antarctic – Antarctica | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic | Antarctic – Southern Subpolar Islands, Subantarctic Islands
substrate: rock – siliceous, siliciferous, acidic | rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified
thallus: continuous, diffuse, effuse | granular, granulose, granulate | cracked, fissured, fractured, rimose
[th] upper surface: grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | white(ish) | brown(ish) grey | grey(ish) brown
[th marginal and upper surface] specific structures: absent
ascomata: absent | present
ascoma: perithecial, perithecioid – hymenial
ascoma [mm]: (min) 0.24 (low) 0.3 (high) 0.7 (max) 1.0
ascoma: subsessile, subimmersed, adnate, semi-immersed, emergent
[ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) | grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | brown(ish) black
[ascm, if apoth] margin excipular photobionts: absent
[ascm] paraphyses/-oids: absent
asci: fissitunicate – bitunicate
[asc] tholus: thickened
[asc] tholus amyloidity (iodine reaction): absent
ascospores: (median) 8.0
[asp] shape: ellipsoidal | elongate-fusiform, ellipsoidal-fusiform
[asp] length [µm]: (min) 16.5 (low) 21.0(median) 24.8 (high) 28.5 (max) 36.5
[asp] width [µm]: (min) 7.5 (low) 10.0(median) 11.7 (high) 13.5 (max) 16.5
[asp] septa: present
[asp] septa: transversely septate
[asp] transversal septa: (median) 1.0
[asp] pigmentation: hyaline, colourless
[asp] perispore, epispore: not apparent
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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