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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 margarodes (Körb.) Nyl.
  Flora 47: 266 (1864); Zeora margarodes Körb., Abh. Schles. Ges. Vaterl. Cult., Abth. Naturwiss. 2: 31 (1862). T: Neuholland [Australia], s. dat., F.Hochstetter; holo: L; iso: M. *****Lecanora continua C.Knight, in J.Shirley, Proc. Roy. Soc. Queensland 6: 134 (1889). T: Mt Mistake Ra., Qld, J.Shirley 198; holo: WELT. *****Lecanora knightiana Müll.Arg., Bull. Herb. Boissier 3: 633 (1895). T: Thursday Is., Qld, 1887, C.Knight 213; lecto: G, fide H.T.Lumbsch & J.A.Elix, Fl. Australia 56A: 209 (2004).  
  Thallus plane, continuous to rimose-areolate or dispersed-verruculose, yellowish white to yellowish grey, or whitish grey to slightly greenish grey, epruinose. Soredia absent. Prothallus not visible. Apothecia immersed when immature, becoming sessile, 0.6–1.6 mm diam.; disc pale to dark red-brown or wax-coloured to dark grey-brown, epruinose; margin concolorous with the thallus, thin, entire, ±verrucose. Cortex hyaline, inspersed with small crystals, 10–25 µm thick laterally and 10–35 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 reddish brown, K–, with crystals soluble in KOH (pulicaris-type), c. 10–15 µm thick. Hymenium, subhymenium and hypothecium hyaline. Paraphyses sparingly branched and not or slightly thickened apically. Ascospores ellipsoidal, 10.0–15.0 × 5.0–8.5 µm. CHEMISTRY: Thallus and apothecial margin K+ yellow, C+ orange, Pd+ red; containing atranorin (major), isoarthothelin (major), pannarin (major), thiophanic acid (submajor), arthothelin (submajor), chloroatranorin (minor), 7-chloronorlichexanthone (minor), 2,4-dichloronorlichexanthone (minor), 2,7-dichloronorlichexanthone (minor), 4,5-dichloronor-lichexanthone (minor) and 5,7-dichloronorlichexanthone (minor).
  An endemic, saxicolous species in ±shaded habitats in subtropical and temperate rainforest and wet-sclerophyll forest in eastern Qld, N.S.W., Vic. and Tas.; also in Papua New Guinea.  
  Lumbsch & Elix (2004)  

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

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