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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
Herpothallon echinatum Aptroot, Lücking & Will-Wolf

in A.Aptroot, G.Thor, R.Lücking, J.A.Elix & J.L.Chaves, Biblioth. Lichenol. 99: 38 (2008)

T: Tropica Verde Reforestation Project (Tempisque Conservation Area), Guanacaste, Costa Rica, Mar. 2004, S.Will-Wolf 12901; holo: F; iso: INB.

  Thallus corticolous or lignicolous, loosely appressed to the substratum, byssoid to minutely felty and rather soft, often seemingly farinose due to loose soredioid fragments, to 6 cm wide, dull, pale mineral-green, to 100 µm thick, lacking calcium oxalate crystals; hyphae 1–2 µm wide. Hypothallus below the entire thallus, byssoid, white; hyphae 1–2 µm wide. Prothallus to 1 mm wide, composed of byssoid and radiating hyphae, whitish. Pseudoisidia numerous, cylindrical, mostly unbranched, arising perpendicu­larly but often slanted, pale mineral-green, without conspicuously white tips, felty with projecting hyphae, to 0.5 mm long and 0.1 mm wide. Photobiont cells in short irregular filaments, 6–10 ´ 6–8 µm. Asci and pycnidia not seen.
CHEMISTRY: Thallus and prothallus C–, K–, P+ yellow, UV–, I–, K/I–; containing psoromic acid, ± 2’-O-demethylpsoromic acid.
  Corticolous and lignicolous in north-eastern Qld; also in Costa Rica, SE Asia, New Guinea and Norfolk Island.  
  Elix (2009c)  

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

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