LIAS light – Item Descriptions
LIASlight ItemID: 7630
Arthonia gerhardii Egea & Torrente
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Americas – North America (incl Mexico) |
| substrate: | rock, stones, pebbles – unspecified |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | crustose (crustaceous) – episubstratal – unspecified |
| thallus: | compartimentized – areolate, squamulate |
| [th] upper surface: | white(ish) grey | grey(ish) white |
| [th marginal and upper surface] specific structures: | absent |
| [th] morphol substructures (eg areoles, squamules): | discontiguous, dispersed (throughout the thallus) |
| [th] morphol substructures (eg areoles, lobes, branches) upper surface: | smooth, plane | granulose, granular |
| ascomata: | absent | present |
| ascoma: | apothecial, apothecioid – hymenial |
| ascoma [mm]: | (low) 0.6 (high) 2.5 |
| ascoma: | immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent |
| [ascm, if apoth] disc, mazaedium: | subconvex, slightly convex | convex |
| [ascm, if apoth] disc, mazaedium: | red(dish) brown (if pale: orange brown) | black(ish) red |
| [ascm, if apoth] margin excipular photobionts: | present |
| [ascm] paraphyses/-oids: | present |
| [ascm] epihymenium, epithecium: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | red(dish) brown (pale: orange brown) |
| asci: | fissitunicate – bitunicate |
| [asc] tholus: | thickened |
| ascospores: | (median) 8.0 |
| [asp] shape: | ovoid, ovate |
| [asp] length [µm]: | (low) 6.0 (high) 7.0 |
| [asp] width [µm]: | (low) 15.0 (high) 18.0 |
| [asp] septa: | present |
| [asp] septa: | transversely septate |
| [asp] transversal septa: | (low) 2.0 (high) 3.0 |
| [asp] pigmentation: | hyaline, colourless | pale brown | medium brown, brownish |
| [asp] perispore, epispore: | not apparent | thin, thinly halonate |
| conidiomata: | absent | present |
| conidia: | [cur] – curved, unciform, falcate, sickle-shaped |
| [co] length [µm]: | (low) 14.0 (high) 20.0 |
| secondary metabolites: | present |
| secondary metabolites: | confluentic acid | psoromic acid |
| primary photobiont: | present |
| secondary photobionts (eg in cephalodia): | absent |
| primary photobiont: | chlorophytaceous – trentepohliaceous, trentepohlioid |