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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
Pyrenula xanthominuta Aptroot

Australas. Lichenol. 60: 40 (2007)

T: Fitzroy I., [near Cairns], Qld, Mar. 1988, A. & M.Aptroot 22303; holo: CANB; iso: ABL.

  Thallus brownish to olive-green, with many colourless crystals and some minute pseudocyphellae, corticate. Ascomata solitary, subglobose, erumpent from the substratum, largely or ±completely covered by the thallus, c. 0.3–0.5 mm diam. Ascomatal wall with crystals, to 60 μm thick; ostiole apical, pale to medium brown. Hamathecium not inspersed with oil droplets, IKI–. Ascospores 8 per ascus, irregularly biseriate, 3-septate, fusiform, with rounded ends, grey to brown, 9–11 × 6.5–8.0 μm; lumina angular, broader than long, occasionally not aligned; terminal lumina separated from the exospore by an endospore layer.
CHEMISTRY: Thallus UV+ yellow or UV–; lichexanthone detected with TLC.
  Very rare in coastal areas of the N.T. and north-eastern Qld; endemic.  
  Aptroot (2009c)  

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

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