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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
 Hemithecium contortum (Müll.Arg.) A.W.Archer

Telopea 11: 75 (2005)

Graphina contorta Müll.Arg., Rev. Mycol. 9: 81 (1887).

T: Nouméa, Grande Terre, New Caledonia, 1886, T.Savès 11; holo: G.

Graphina incerta Redinger, Ark. Bot. 26A(1): 59 (1933);Hemithecium incertum (Redinger) A.W.Archer, Telopea 11: 75 (2005), as incerta. T: Colonia Risso, Paraguay, 28 Oct. 1883, G.O.A.Malme 3644; lecto: S, fide A.W.Archer, Mycotaxon 80: 372 (2001).

  Thallus off-white, thin, smooth to tuberculate, dull. Ascomata inconspicuous, immersed, numerous, scattered, visible as thin black lines on the thallus surface, straight, curved or sinuous, rarely branched, 0.8–3.0 mm long, 0.10–0.35 mm wide; thalline margin indistinct. Proper exciple inconspicuous, pale yellowish brown, darker towards the apex. Hymenium (100–) 125–150 µm thick, I–. Ascospores 1 per ascus, muriform, 12–16 × 2–4-locular, (55–) 80–100 × 16–28 µm, I+ blue-violet.
CHEMISTRY: No lichen compounds detected.
  An uncommon, corticolous species in eastern Qld; also in Paraguay, New Caledonia and New Zealand.  
  Archer (2009a)  

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

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