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Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Lecanora pseudargentata Lumbsch
  J. Hattori Bot. Lab. 77: 127 (1994). T: NE of Gunalda, E of Hwy 1, c. 59 km S of Maryborough, Qld, 22 Aug. 1986, J.Hafellner 18604 & R.W.Rogers; holo: GZU.  
  Thallus thin, dispersed-verrucose or verruculose, yellowish white to whitish grey, epruinose. Soredia absent. Prothallus not visible. Apothecia sessile to constricted at the base, 0.4–1.0 mm diam.; disc dark red-brown to blackish brown, epruinose or slightly pruinose; margin concolorous with the thallus, thin, entire, ±verrucose to verruculose. Cortex hyaline, inspersed with small crystals, c. 20 µm thick laterally and 20–25 µm thick basally. Amphithecium with large crystals insoluble in KOH (pulicaris-type). Parathecium hyaline, 10–15 µm thick, with numerous small crystals soluble in KOH. Epihymenium red-brown, c. 10–15 µm thick, with numerous crystals (chlarotera-type); pigmentation rapidly soluble in KOH. Hymenium, subhymenium and hypothecium hyaline. Paraphyses sparingly branched and not to slightly thickened apically. Ascospores ellipsoidal to broadly ellipsoidal, 8.5–12.5 × 6.5–8.0 µm. CHEMISTRY: Thallus and apothecial margin K+ yellow, C–, Pd+ pale orange; containing atranorin (major), gangaleoidin (major), chloroatranorin (minor), 4-dechlorogangaleoidin (minor) and norgangaleoidin (minor).
  Occurs in south-eastern Qld; grows on the bark of various trees including Ficus and Rhizophora. Also in Central and South America.  
  Lumbsch & Elix (2004)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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