LIAS light – Item Descriptions
LIASlight ItemID: 1868
Dermatocarpon rivulorum (Arnold) Dalla Torre & Sarnth.
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic |
| substrate: | rock – siliceous, siliciferous, acidic |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | peltate, umbilicate |
| thallus: | continuous, diffuse, effuse |
| [th] upper surface: | grey(ish) brown | green(ish) brown (olive brown) |
| [th upper surface]: | epruinose | pruinose |
| [th upper surface] pruina: | scarce, sparse, fine |
| [th marginal and upper surface] specific structures: | absent |
| [th] morphol substructures (eg areoles, lobes, branches) width [mm]: | (low) 15.0 (high) 35.0 |
| [th] morphol substructures (eg areoles, squamules): | contiguous, coherent (throughout the thallus) |
| [th] lower surface: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) |
| [th lower surface] specific structures: | absent |
| [th] medulla amyloidity: | absent |
| ascomata: | absent | present |
| ascoma: | perithecial, perithecioid – hymenial |
| [ascm] paraphyses/-oids: | absent |
| asci: | fissitunicate – verrucarialean |
| [asc] tholus: | thickened |
| [asc] tholus amyloidity (iodine reaction): | absent |
| ascospores: | (median) 8.0 |
| [asp] length [µm]: | (low) 13.0 (high) 21.0 (max) 24.0 |
| [asp] width [µm]: | (min) 6.0 (low) 6.5 (high) 8.5 (max) 9.0 |
| [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: | chlorophytaceous – trebouxiaceous, chlorococcoid |