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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 austrotropica Lumbsch
  J. Hattori Bot. Lab. 77: 72 (1994). T: Eimeo Ck, Sunset Beach, Qld, 14 Aug. 1976, G.N.Stevens; holo: BRI.  
  Thallus dispersed-verrucose to verruculose or continuous, yellowish white to yellowish grey or whitish grey, epruinose, sometimes glossy. Soredia absent. Prothallus not visible. Apothecia sessile, 0.2–0.9 mm diam.; disc pale to dark red-brown, epruinose or slightly whitish grey-pruinose; margin concolorous with the thallus, thin to thick, entire, ±verrucose to crenulate, often with a visible parathecial ring. Cortex hyaline, 15 µm thick laterally, 15–20 µm thick basally. Amphithecium with large crystals insoluble in KOH (pulicaris-type). Parathecium hyaline, with numerous small crystals soluble in KOH, 10–15 µm thick. Epihymenium reddish brown, K–, without crystals (glabrata-type), c. 10–15 µm thick, with a 1.5 µm thick hyaline layer above. Hymenium, subhymenium and hypothecium hyaline. Paraphyses sparingly branched and thickened apically. Ascospores ellipsoidal, 11.5–15.0 × 6.5–8.0 µm. CHEMISTRY: Thallus and apothecial margin K+ yellow, C+ orange, Pd+ pale orange; containing roccellic acid (major), arthothelin (major), chloroatranorin (submajor), atranorin (submajor), 2,4-dichloronorlich-exanthone (minor), 2,5-dichloronorlichexanthone (minor) and 4,5-dichloronorlichexanthone (minor).
  A corticolous species in subtropical to tropical regions of eastern and north-eastern Australia (Qld and N.S.W.); especially common in mangroves. Also in Norfolk Is.  
  Lumbsch & Elix (2004)  

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

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