LIAS light – Item Descriptions
LIASlight ItemID: 11699
Placopsis albida (Kremp.) I. M. Lamb
| Characters[*]: | Character States[*]: |
|---|---|
| global occurrence: | Oceania – Pacific Islands (Melanesia, Micronesia, Polynesia) | Eurasia – Asia Tropical |
| substrate: | rock, stones, pebbles – unspecified |
| life habit: | lichenized (mutualistic with algal photobionts) |
| thallus: | crustose (crustaceous) – episubstratal – unspecified | placodioid-crustose, placodioid-foliose |
| [th] upper surface: | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | green(ish) grey | grey(ish) green | grey(ish) white | yellow(ish) white (ivory, off-white, cream-coloured) |
| [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]: | (min) 0.2 (low) 1.0 (high) 1.5 |
| [th] morphol substructures (eg areoles, lobes, branches) upper surface: | rugose, plicate, folded, pustulate, faveolate, wrinkled | cracked, fissured, fractured, rimulose, subrimose |
| ascomata: | absent | present |
| ascoma: | apothecial, apothecioid – hymenial |
| ascoma [mm]: | (low) 0.2 (high) 1.0 (max) 2.0 |
| ascoma: | sessile, superficial |
| [ascm, if apoth] disc, mazaedium: | plane, flat, flattened, expanded | subconcave, slightly concave |
| [ascm, if apoth] disc, mazaedium: | blue(ish) brown (violet brown) | red(dish) brown (if pale: orange brown) |
| [ascm, if apoth] disc, mazaedium: | epruinose | pruinose |
| [ascm, if apoth] disc, mazaedium pruina: | scarce, sparse, fine |
| [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: | yellow(ish) brown |
| [ascm] paraphyses/-oids: | present |
| [ascm] epihymenium, epithecium: | blue(ish) brown (violet brown) | green(ish) brown (olive brown) |
| asci: | lecanoralean |
| [asc] tholus: | thickened |
| [asc] tholus amyloidity (iodine reaction): | absent |
| ascospores: | (median) 8.0 |
| [asp] shape: | broadly ellipsoidal |
| [asp] length [µm]: | (low) 13.5 (high) 18.0 (max) 23.0 |
| [asp] width [µm]: | (min) 6.5 (low) 8.0 (high) 10.0 (max) 12.0 |
| [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) 15.0 (high) 25.0 (max) 30.0 |
| secondary metabolites: | present |
| secondary metabolites: | atranorin | gyrophoric acid | lecanoric acid |
| primary photobiont: | present |
| secondary photobionts (eg in cephalodia): | present |
| primary photobiont: | chlorophytaceous – trebouxiaceous, chlorococcoid |