Department of the Environment and Water Resources home page

About us | Contact us | Publications | What's new

Header imagesHeader imagesHeader images

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
Chroodiscus australiensis Vězda & Lumbsch

in H.T.Lumbsch & A.Vězda, Nova Hedwigia 50: 246 (1990)

T: Souita Falls, Atherton Tableland, Qld, 16 Aug. 1987, H.T.Lumbsch 5437/17ei; holo: F; iso: Herb. Vězda.

  Thallus to c. 40 µm thick, pale greenish, dull to glossy, smooth, continuous, non-rimose. Protocortex to c. 10 µm thick. Algal layer well developed, continuous; calcium oxalate crystals abundant, small to moderately large, forming a ±continuous layer beneath the algae. Vegetative propagules not seen. Ascomata conspicuous, to c. 0.3 mm diam., ±rounded, solitary to marginally slightly fused, immersed to slightly raised. Disc completely visible from above, bright orange to reddish orange, epruinose. Proper exciple not visible from above; thalline rim margin thin, entire to slightly split, ±distinctly lobed when young, becoming eroded, pale orange, slightly incurved to erect, rarely recurved. Proper exciple fused, pale orange, non-amyloid. Hymenium to c. 50 µm thick, pale orange, moderately conglutinated. Epihymenium pale orange to rust-red, with rather small rust-red crystals. Ascus tholus initially thin, not visible at maturity. Ascospores transversely septate, ellipsoidal to more often fusiform, with narrowly rounded to subacute ends, 7–10 × 2–3 µm, with 2 (–3) locules; locules mostly conical; internal locule angular in 3-locular ascospores; septa thin; endospore absent.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), hypostictic acid (major); ascomata K+ purplish, containing an unknown anthraquinone.
  Occurs on leaves in rainforest in north-eastern Qld, at altitudes to 700 m; pantropical.  
  Mangold et al. (2009)  

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

This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from Australian Biological Resources Study. Requests and inquiries concerning reproduction and rights should be addressed in the first instance to Dr P. McCarthy. These pages may not be displayed on, or downloaded to, any other server without the express permission of ABRS.

Top | About us | Advanced search | Contact us | Information services | Publications | Site index | What's new