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
Chapsa megaphlyctidioides Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 654 (2009)

T: 5 km on Buchanan Creek road, Cape Tribulation, Qld, 4 July 1983, M.E.Hale 831619; holo: U.

  Thallus endophloeodal to epiphloeodal, to c. 150 µm thick, olive to yellowish green, moderately glossy to waxy, smooth, continuous to slightly verrucose, non-rimose. True cortex continuous, to c. 50 µm thick, hyaline to pale yellowish, consisting of periclinal to, rarely, irregular hyphae. Algal layer continuous, well developed; calcium oxalate crystals abundant only near ascomata, small to moderately large, clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded to slightly irregular, often appearing irregular or sparingly branched in fused ascomata, distinctly chroodiscoid, erumpent, solitary to fused, occasionally regenerating, immersed to slightly raised. Disc completely visible from above, pale flesh-coloured to pale greyish, whitish-pruinose. Proper exciple not visible from above; thalline rim margin split and ±lobed, in older ascomata becoming moderately layered, whitish, finely pruinose, ±brownish towards the outside, becoming erect to recurved. Exciple fused, thin, hyaline internally, yellowish brown marginally, apically with pale greyish brown granules, non-amyloid. Hymenium to c. 70 µm thick, weakly conglutinated; paraphyses slightly bent, parallel to slightly interwoven, the tips not thickened or thickened and somewhat irregular; lateral paraphyses conspicuous, to c. 20 µm long. Epihymenium hyaline, with greyish granules, occasionally with small crystals. Asci 8-spored; tholus initially thin, not visible at maturity. Ascospores transversely septate, fusiform to clavate, the ends subacute to acute, hyaline, non-amyloid, 10–18 × 3–5 µm, with 4–6 (–8) locules; locules angular to slightly rounded, predominantly ±rectangular; end cells usually conical; septa thin, irregular; ascospore wall thin, with a thick halo; endospore thin.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), constictic acid (major), hypoconstictic acid (trace), cryptostictic acid (trace), a-acetyl-hypoconstictic acid (trace), hypostictic acid (trace).
  Known from bark at the type locality in coastal rainforest in north-eastern Qld.  
  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