LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 4817

Placynthium rosulans (Th. Fr.) Zahlbr.

Characters[*]:Character States[*]:
global occurrence: Oceania – Australasia | Eurasia – Europe
substrate: rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: placodioid-crustose, placodioid-foliose
[th] upper surface: brown(ish) green (olivaceous, olive green) | green(ish) brown (olive brown)
[th upper surface]: epruinose
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 0.2 (high) 0.5 (max) 0.8
[th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | rugose, plicate, folded, pustulate, faveolate, wrinkled
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
ascoma [mm]: (low) 0.2 (high) 0.8 (max) 1.0
ascoma: sessile, superficial
[ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex
[ascm, if apoth] disc, mazaedium: black(ish) | red(dish) brown (if pale: orange brown)
[ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: red(dish) brown (if pale: orange brown)
[ascm] paraphyses/-oids: present
[ascm] paraphyses/-oid cells width [µm]: (median) 1.5
[ascm] epihymenium, epithecium: black(ish) | brown(ish) black
asci: lecanoralean
[asc] tholus: thickened
[asc] tholus amyloidity (iodine reaction): present
[asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc)
ascospores: (median) 8.0 (max) 10.0
[asp] shape: ovoid, ovate
[asp] length [µm]: (low) 11.5 (high) 13.5
[asp] width [µm]: (low) 6.5 (high) 8.2
[asp] septa: absent – spore lumen unilocular, monolocular
[asp] pigmentation: hyaline, colourless
[asp] perispore, epispore: not apparent
secondary metabolites: absent
primary photobiont: present
secondary photobionts (eg in cephalodia): absent
primary photobiont: cyanobacterial

[*] 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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