LIAS light – Item Descriptions
LIASlight ItemID: 14183
Placopsis centrifuga D. J. Galloway
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Oceania – Australasia |
| substrate: | rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | placodioid-crustose, placodioid-foliose |
| thallus: | compartimentized – areolate, squamulate |
| [th] upper surface: | brown(ish) green (olivaceous, olive green) | grey(ish) brown | green(ish) brown (olive brown) |
| [th upper surface]: | pruinose |
| [th upper surface] pruina: | scarce, sparse, fine | dense |
| [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]: | (min) 1.0 (low) 2.0 (high) 3.0 (max) 4.0 |
| [th] morphol substructures (eg areoles, lobes, branches) upper surface: | smooth, plane | rugulose, finely wrinkled |
| ascomata: | absent | present |
| ascoma: | apothecial, apothecioid – hymenial |
| ascoma [mm]: | (low) 0.5 (high) 1.0 |
| ascoma: | sessile, superficial |
| [ascm, if apoth] disc, mazaedium: | concave | plane, flat, flattened, expanded |
| [ascm, if apoth] disc, mazaedium: | red(dish) brown (if pale: orange brown) |
| [ascm, if apoth] disc, mazaedium: | pruinose |
| [ascm, if apoth] disc, mazaedium pruina: | dense |
| [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: | white(ish) |
| [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: | yellow(ish) brown | red(dish) brown (if pale: orange brown) |
| [ascm] paraphyses/-oids: | present |
| [ascm] paraphyses/-oid cells width [µm]: | (min) 2.5 |
| [ascm] epihymenium, epithecium: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) |
| asci: | lecanoralean |
| [asc] tholus: | thickened |
| [asc] tholus amyloidity (iodine reaction): | absent |
| ascospores: | (median) 8.0 |
| [asp] shape: | broadly ellipsoidal | ovoid, ovate |
| [asp] length [µm]: | (low) 25.0 (high) 27.0 (max) 28.5 |
| [asp] width [µm]: | (low) 13.0 (high) 15.0 |
| [asp] septa: | absent – spore lumen unilocular, monolocular |
| [asp] pigmentation: | hyaline, colourless |
| [asp] perispore, epispore: | not apparent | thin, thinly halonate |
| conidiomata: | absent | present |
| conidia: | filiform, vermiform |
| [co] length [µm]: | (low) 16.5 (high) 20.0 |
| secondary metabolites: | present |
| secondary metabolites: | gyrophoric acid | lecanoric acid | methyl lecanorate |
| primary photobiont: | present |
| secondary photobionts (eg in cephalodia): | present |
| primary photobiont: | chlorophytaceous – trebouxiaceous, chlorococcoid |