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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 australasicum (Elix) Elix & G.Thor

in A.Aptroot, G.Thor, R.Lücking, J.A.Elix & J.L.Chaves, Biblioth. Lichenol. 99: 33 (2008)

Cryptothecia australasica Elix, Australas. Lichenol. 60: 16 (2007).

T: Mossman–Mount Molloy road, 1 km S of Lions Lookout, 20 km N of Mount Molloy, Qld, 16°32’05”S, 145°22’59”E, on leaves of roadside treelet at margin of rainforest, 4 Aug. 2006, J.A.Elix 36920; holo: BRI; iso: CANB.

  Thallus effuse, forming irregularly spreading patches to 3 cm wide, loosely appressed to the substratum, not flaking off, minutely felty, dull, pale grey to grey or greenish grey, with scattered paler slightly raised areas, continuous, to 300 µm thick, with numerous calcium oxalate crystals in the photobiont layer; hyphae 1–2 µm wide. Hypothallus sparse, indistinctly byssoid, white, rarely with red areas, composed of 1–2 µm wide hyphae. Prothallus to 1.5 mm wide, byssoid, composed of interwoven and radiating hyphae, white or with orange-red areas, or completely orange-red. Pseudoisidia numerous, cylindrical, rarely subglobose, unbranched or sparingly branched, with few projecting hyphae, concolorous with the thallus, 0.1–1.0 mm long, 0.05–0.10 mm wide. Photobiont cells solitary or a few aggregated, rounded to oblong, 8–14 × 7–12 µm. Medulla thin, distinct, white. Asci and pycnidia not seen.
CHEMISTRY: Thallus K–, C–, KC–, P+ yellow, UV–; containing psoromic acid (major), 2’-O-demethylpsoromic acid (trace), subpsoromic acid (trace), unknown quinone (trace).
  This endemic species occurs on leaves in montane rainforest in north-eastern Qld.  
  Elix (2009c)  

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

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