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Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Chapsa halei Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 653 (2009)

T: Mount Lewis road, W of Mossman, 12 km N from Kennedy Hwy, Qld, 3 July 1983, M.E.Hale 831320; holo: US.

  Thallus endophloeodal to epiphloeodal, to c. 150 µm thick, pale grey, dull, porous to rough, continuous to rugose, predominantly non-rimose. True cortex absent, the thallus with a thin discontinuous protocortex to c. 10 µm thick. Algal layer ±continuous, moderately well developed; calcium oxalate crystals abundant, usually small and scattered, rarely clustered. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.8 mm diam., ±rounded to more commonly irregular or somewhat elongate, apothecioid when young, becoming chroodiscoid, erumpent, mostly solitary, immersed. Disc usually partly visible, rarely completely visible from above, off-white to pale brownish, epruinose to indistinctly pruinose. Proper exciple not visible from above; thalline rim margin irregular, coarsely split, usually with 2–4 large thick irregular lobes, rarely somewhat eroded, concolorous with the thallus, becoming erect to recurved. Exciple fused, often incorporating substratum material and crystals, hyaline internally to pale yellowish or yellowish brown marginally, non-amyloid. Hymenium to c. 70 µm thick, weakly conglutinated; paraphyses thick, straight, parallel, the tips not thickened to slightly thickened; lateral paraphyses conspicuous, to c. 20 µm long, rather thick, with fine granules attached to the surface. Epihymenium hyaline, occasionally with fine greyish brown granules. Asci 8-spored; tholus thin, usually not visible at maturity. Ascospores transversely septate, mostly fusiform to clavate, with ±rounded to subacute ends, hyaline, non-amyloid, 10–13 × 2–3 µm, with 3–6 locules; locules ±rounded, subglobose to oblong or irregular; end cells conical; septa regular, thin to thick; ascospore wall thick, non-halonate.
CHEMISTRY: Thallus K–, C–, P–; no compounds detectable by TLC.
  Endemic and known only from the type locality in north-eastern Qld; grows on tree bark in rainforest at 800 m.  
  Mangold et al. (2009)  

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

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