LiasLight

LIAS light – Item Descriptions


LIASlight ItemID: 4820

Placynthium nigrum var. tantaleum (Hepp) Arnold

Characters[*]:Character States[*]:
global occurrence: Eurasia – Europe | Americas – North America (incl Mexico) | Arctic
substrate: bark, cork, plant surface – trunks, branches, twigs | rock, stones, pebbles – unspecified
life habit: lichenized (mutualistic with algal photobionts)
thallus: crustose (crustaceous) – episubstratal – unspecified
thallus: granular, granulose, granulate | compartimentized – areolate, squamulate
[th] upper surface: black(ish) | blue(ish) black | brown(ish) black | grey(ish) white
[th marginal and upper surface] specific structures: absent
[th] morphol substructures (eg areoles, lobes, branches) width [mm]: (min) 2.0
[th] morphol substructures (eg areoles, lobes, branches) upper surface: granulose, granular
ascomata: absent | present
ascoma: apothecial, apothecioid – hymenial
[ascm, if apoth] disc, mazaedium: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon)
[ascm] paraphyses/-oids: present
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
[asp] shape: broadly ellipsoidal | ovoid, ovate
[asp] length [µm]: (min) 9.0 (low) 10.0 (high) 13.0 (max) 20.0
[asp] width [µm]: (min) 5.5 (low) 6.0 (high) 8.0 (max) 9.0
[asp] septa: absent – spore lumen unilocular, monolocular | present
[asp] septa: transversely septate
[asp] transversal septa: (median) 1.0
[asp] pigmentation: hyaline, colourless
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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