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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
Ocellularia roseotecta Homchantara & Coppins

Lichenologist 34: 128 (2002)

T: 2 km NW of Melinau Gorge, Gunong Mulu Natl Park, Baram District, 4th Division, Sarawak, Malaysia, 14 Apr. 1978, B.J.Coppins 5508 (as 5507); holo: E; iso: RAMK.

  Thallus endophloeodal to epiphloeodal, to c. 200 µm thick, pale to medium greenish grey, dull to slightly glossy, smooth to uneven, ±verrucose to verruculose, rimose, often eroded near ascomata, exposing the whitish to pale reddish medulla. True cortex discontinuous, to c. 10 µm thick, formed by periclinal hyphae. Algal layer well developed, continuous, often appearing discontinuous due to crystal inclusions; calcium oxalate crystals abundant, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 1 mm diam., ±rounded to irregular, apothecioid, solitary to fused, immersed to ±emergent, often verrucose, hemispherical to urceolate. Disc with the columella visible from above, pruinose, off-white to pale reddish, free to fused with the thalline rim, entire to slightly irregular, especially in older ascomata. Pores formed by the thalline rim margin, small to gaping, to c. 0.6 mm diam., ±rounded to slightly irregular, moderately thick, entire to ±eroded at maturity, the apex of the proper exciple becoming visible from above as a brownish line, otherwise concolorous with the thallus; thalline rim incurved to erect. Proper exciple fused, moderately thin to thick, yellowish brown to pale brownish internally, brown to carbonised marginally, covered by a ±thick layer of greyish granules, non-amyloid. Hymenium to c. 120 µm thick, not inspersed, conglutinated; paraphyses ±bent, parallel to slightly interwoven, unbranched, with slightly thickened tips; columellar structures well-developed, to c. 500 µm wide, entire, rarely complex, brown to carbonised, covered by a ±thick layer of greyish granules. Epihymenium hyaline, with greyish or brownish granules. Asci 8-spored; tholus initially thick, rather thin when mature. Ascospores transversely septate, oblong to fusiform or clavate, with ±rounded to subacute ends, hyaline, distinctly amyloid, 15–25 × 6–8 µm, with 4–8 locules; locules ±rounded to slightly angular, oblong to lentiform or ±irregular; end cells hemispherical to conical; septa moderately thin, regular; ascospore wall and endospore moderately thick; wall non-halonate. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellow, C–, P+ orange; containing an unidentified substance; by TLC visible as a pale orange to pale brownish (UV–) spot after charring (UV+ blue before charring), with Rf 32 (solvent B’).
  Known from bark in rainforest in north-eastern Qld, at an altitude of 800 m; also in Malaysia.  
  Mangold et al. (2009)  

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

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