LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 7630

Arthonia gerhardii Egea & Torrente

Characters[*]:Character States[*]:
global occurrence: Americas – North America (incl Mexico)
substrate: rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – episubstratal – unspecified
thallus: compartimentized – areolate, squamulate
[th] upper surface: white(ish) grey | grey(ish) white
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, squamules): discontiguous, dispersed (throughout the thallus)
[th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | granulose, granular
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (low) 0.6 (high) 2.5
ascoma: immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent
[ascm, if apoth] disc, mazaedium: subconvex, slightly convex | convex
[ascm, if apoth] disc, mazaedium: red(dish) brown (if pale: orange brown) | black(ish) red
[ascm, if apoth] margin excipular photobionts: present
[ascm] paraphyses/-oids: present
[ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | red(dish) brown (pale: orange brown)
asci: fissitunicate – bitunicate
[asc] tholus: thickened
ascospores: (median) 8.0
[asp] shape: ovoid, ovate
[asp] length [µm]: (low) 6.0 (high) 7.0
[asp] width [µm]: (low) 15.0 (high) 18.0
[asp] septa: present
[asp] septa: transversely septate
[asp] transversal septa: (low) 2.0 (high) 3.0
[asp] pigmentation: hyaline, colourless | pale brown | medium brown, brownish
[asp] perispore, epispore: not apparent | thin, thinly halonate
conidiomata: absent | present
conidia: [cur] – curved, unciform, falcate, sickle-shaped
[co] length [µm]: (low) 14.0 (high) 20.0
secondary metabolites: present
secondary metabolites: confluentic acid | psoromic acid
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.


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