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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
Chapsa niveocarpa Mangold

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

T: Tumoulin Rd, 5 km from turnoff to Ravenshoe, Atherton Tableland, Qld, 2003, H.T.Lumbsch 19151p & A.Mangold; holo: BRI; iso: CANB.

  Thallus endophloeodal to epiphloeodal, to c. 200 µm thick, pale grey to pale greyish green, dull, rough to somewhat pruinose, often with the substratum protruding, continuous, non-rimose. Cortical structures usually absent, rarely with a thin discontinuous protocortex to 20 µm thick. Algal layer poorly to well developed, discontinuous; calcium oxalate crystals abundant, small, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded to slightly irregular, especially in fused ascomata, apothecioid to chroodiscoid in older ascomata, erumpent, solitary or fused, sometimes regenerating, immersed. Disc partly to completely visible from above, pale greyish to whitish, strongly pruinose. Proper exciple not visble from above, sometimes visible when partly detached, whitish; thalline rim margin irregular, usually coarsely split and lobed, occasionally eroded, slightly to distinctly layered, strongly whitish-pruinose on the inside, becoming erect to ±recurved. Proper exciple thin to evanescent, hyaline internally to pale yellowish to pale orange marginally, incorporating substratum material, apically covered by a usually thick layer of greyish granules, non-amyloid. Hymenium to c. 200 µm thick, inspersed with granules, weakly conglutinated; paraphyses noticeably inspersed with fine hyaline granules, straight to slightly bent, parallel to slightly interwoven, the tips distinctly thickened; lateral paraphyses conspicuous, to c. 45 µm long, inspersed with fine granules. Epihymenium hyaline, with coarse greyish granules. Asci 1 (–2)-spored; tholus initially thin, not visible at maturity. Ascospores muriform, oblong to slightly fusiform, with rounded to narrowly rounded ends, hyaline, becoming somewhat yellowish to greyish at late maturity, non-amyloid, 80–190 × 20–50 µm, with numerous locules; locules small, angular to rounded, with distinct thin transverse septa in immature ascospores, becoming somewhat irregular; ascospore wall thin, with a thin to thick halo; endospore thin.
CHEMISTRY: Thallus K–, C–, P–; no compounds detectable by TLC.
  Occurs on bark in rainforest in north-eastern Qld, at altitudes of 500–1100 m; endemic.  
  Mangold et al. (2009)  

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

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