LIAS light – Item Descriptions
LIASlight ItemID: 14869
Placopsis imshaugii D. J. Galloway
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Americas – South and Central America |
| substrate: | rock – siliceous, siliciferous, acidic |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | placodioid-crustose, placodioid-foliose |
| thallus: | compartimentized – areolate, squamulate |
| [th] upper surface: | grey(ish) brown | red(dish) brown (if pale: orange brown) |
| [th upper surface]: | epruinose |
| [th marginal and upper surface] specific structures: | absent | present |
| [th margin] cilia, cilioid structures: | absent |
| [th upper surface] isidia, isidioid structures: | absent |
| [th upper surface] soredia, soralia, soralioid structures: | absent |
| [th] morphol substructures (eg areoles, lobes, branches) width [mm]: | (low) 0.5 (high) 2.0 (max) 4.0 |
| [th] morphol substructures (eg areoles, lobes, branches) upper surface: | smooth, plane | verruculose, minutely warted | rugulose, finely wrinkled | uneven, undulate |
| ascomata: | absent | present |
| ascoma: | apothecial, apothecioid – hymenial |
| ascoma [mm]: | (low) 0.8 (high) 1.5 (max) 2.5 |
| ascoma: | immersed, innate | subsessile, subimmersed, adnate, semi-immersed, emergent |
| [ascm, if apoth] disc, mazaedium: | strongly concave, excavate, urceolate |
| [ascm, if apoth] disc, mazaedium: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | yellow(ish) brown |
| [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) | yellow(ish) brown | red(dish) brown (if pale: orange brown) |
| [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: | yellow(ish) brown | hyaline red |
| [ascm] paraphyses/-oids: | present |
| [ascm] epihymenium, epithecium: | red(dish) brown (pale: orange brown) |
| asci: | lecanoralean |
| [asc] tholus: | thickened |
| [asc] tholus amyloidity (iodine reaction): | absent |
| ascospores: | (median) 8.0 |
| [asp] shape: | broadly ellipsoidal |
| [asp] length [µm]: | (low) 25.0 (high) 30.0 |
| [asp] width [µm]: | (low) 15.0 (high) 18.0 (max) 20.0 |
| [asp] septa: | absent – spore lumen unilocular, monolocular |
| [asp] pigmentation: | hyaline, colourless |
| [asp] perispore, epispore: | not apparent |
| conidiomata: | absent | present |
| conidia: | filiform, vermiform |
| [co] length [µm]: | (low) 27.0 (high) 32.5 (max) 35.0 |
| secondary metabolites: | present |
| secondary metabolites: | atranorin | gyrophoric acid | lecanoric acid |
| primary photobiont: | present |
| secondary photobionts (eg in cephalodia): | present |
| primary photobiont: | chlorophytaceous – trebouxiaceous, chlorococcoid |