LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 12709

Arthonia obesa (Müll. Arg.) R. Sant.

Characters[*]:Character States[*]:
global occurrence: Americas – South and Central America
substrate: leaves, fronds, needles – living
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – episubstratal – unspecified
thallus: continuous, diffuse, effuse
[th] upper surface: green(ish) grey
[th upper surface]: epruinose
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (low) 0.4 (high) 1.6 (max) 2.0
ascoma: immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent
[ascm, if apoth] disc, mazaedium: brown(ish) black | blue(ish) brown (violet brown)
[ascm, if apoth] disc, mazaedium: epruinose
[ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: grey(ish)
[ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon)
[ascm] paraphyses/-oids: present
[ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon)
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: ellipsoidal
[asp] length [µm]: (low) 10.0 (high) 16.0 (max) 20.0
[asp] width [µm]: (low) 3.0 (high) 5.0 (max) 7.0
[asp] septa: present
[asp] septa: transversely septate
[asp] transversal septa: (median) 3.0 (max) 4.0
[asp] pigmentation: hyaline, colourless
[asp] perispore, epispore: thin, thinly halonate
secondary metabolites: absent
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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