LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 219

Arthonia didyma Körb.

Characters[*]:Character States[*]:
global occurrence: Eurasia – Asia Extratropical | Oceania – Australasia | Eurasia – Europe | Americas – North America (incl Mexico)
substrate: bark, cork, plant surface – trunks, branches, twigs
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified
[th] upper surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | green(ish) grey | grey(ish) green | yellow(ish) white (ivory, off-white, cream-coloured)
[th marginal and upper surface] specific structures: absent
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (low) 0.06 (high) 0.3
ascoma: immersed, innate
[ascm, if apoth] disc, mazaedium: black(ish) | brown(ish) black | red(dish) brown (if pale: orange brown) | blue(ish) red (purple)
[ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: red(dish) brown (if pale: orange brown)
[ascm] paraphyses/-oids: present
[ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | hyaline, colourless | red(dish) brown (pale: orange brown)
asci: fissitunicate – bitunicate
[asc] tholus: thickened
[asc] tholus amyloidity (iodine reaction): absent | present
[asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc)
ascospores: (median) 8.0
[asp] shape: ovoid, ovate
[asp] length [µm]: (low) 12.0 (high) 18.0
[asp] width [µm]: (min) 4.0 (low) 5.0 (high) 7.0
[asp] septa: present
[asp] septa: transversely septate
[asp] transversal septa: (median) 1.0
[asp] pigmentation: hyaline, colourless | pale brown | medium brown, brownish
[asp] perispore, epispore: not apparent | ornamented, rough, warted, striate, cracked
conidiomata: absent | present
conidia: bacilliform, bacillar
[co] length [µm]: (low) 3.5 (high) 4.0
secondary metabolites: absent | present
secondary metabolites: unknown/unidentified pigment(s)
primary photobiont: present
secondary photobionts (eg in cephalodia): absent
primary photobiont: chlorophytaceous – trentepohliaceous, trentepohlioid

[*] 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.


© 2001–2020 by Botanische Staatssammlung M√ľnchen
Impressum · Disclaimer · Webmaster