LIAS light – Item Descriptions
LIASlight ItemID: 7325
Fissurina humilis (Vain.) Staiger
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Americas – North America (incl Mexico) | Americas – South and Central America | Eurasia – Asia Tropical |
| substrate: | bark, cork, plant surface – trunks, branches, twigs |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | crustose (crustaceous) – episubstratal – unspecified |
| thallus: | continuous, diffuse, effuse |
| [th] upper surface: | grey(ish) | brown(ish) yellow (ochraceous, ochre) | yellow(ish) white (ivory, off-white, cream-coloured) |
| [th upper surface]: | epruinose |
| [th marginal and upper surface] specific structures: | absent |
| [th] morphol substructures (eg areoles, squamules): | contiguous, coherent (throughout the thallus) |
| [th] morphol substructures (eg areoles, lobes, branches) upper surface: | smooth, plane |
| ascomata: | absent | present |
| ascoma: | apothecial, apothecioid – hymenial |
| ascoma [mm]: | (low) 0.2 (high) 0.5 (max) 1.5 |
| ascoma: | immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent |
| [ascm, if apoth] disc, mazaedium: | concave | plane, flat, flattened, expanded |
| [ascm, if apoth] disc, mazaedium: | grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) |
| [ascm, if apoth] disc, mazaedium: | epruinose |
| [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) |
| [ascm, if apoth] margin excipular photobionts: | present |
| [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: | hyaline, colourless |
| [ascm] paraphyses/-oids: | present |
| [ascm] paraphyses/-oid cells width [µm]: | (median) 1.5 |
| [ascm] epihymenium, epithecium: | hyaline, colourless |
| asci: | unitunicate |
| [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) 16.0 (high) 20.0 |
| [asp] width [µm]: | (low) 7.0 (high) 9.0 |
| [asp] septa: | present |
| [asp] septa: | transversely septate |
| [asp] transversal septa: | (median) 3.0 |
| [asp] pigmentation: | hyaline, colourless |
| [asp] perispore, epispore: | not apparent | thin, thinly halonate |
| secondary metabolites: | absent |
| primary photobiont: | present |
| secondary photobionts (eg in cephalodia): | absent |
| primary photobiont: | chlorophytaceous – trentepohliaceous, trentepohlioid |