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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 bicuspidata (Müll.Arg.) Mangold, Elix & Lumbsch

Biblioth. Lichenol. 96: 129 (2007)

Thelotrema bicuspidatum Müll.Arg., Nuovo Giorn. Bot. Ital. 23: 395 (1891).

T: Sankeys Scrub, Brisbane, Qld, F.M.Bailey 631; holo: G; iso: BRI (AQ721245), US.

  Thallus endophloeodal to epiphloeodal, to c. 300 µm thick, pale grey to pale yellowish grey, rarely pale greenish grey, dull, smooth to rough, continuous to ±verrucose or verruculose, ±rimose. Protocortex discontinuous, to c. 25 µm thick. Algal layer poorly developed, continuous; calcium oxalate crystals small to moderately large and clustered. Vegetative propagules not seen. Ascomata to c. 0.6 mm diam., ±rounded, perithecioid, solitary, immersed to moderately raised, then mostly hemispherical. Disc not visible from above; pore filled by the columella tip formed by a whitish pruina cluster or by protruding ascospores. Pores small, to c. 0.1 mm diam., ±rounded, entire; apex of proper exciple occasionally becoming visible from above, ±free, whitish, incurved. Thalline rim margin small, ±rounded, thin to moderately thick, occasionally annulate, entire and ±distinctly brownish; thalline rim incurved. Proper exciple fused to free in endophloeodal parts, thin, strongly carbonised, non-amyloid. Hymenium to c. 420 µm thick, not inspersed, strongly conglutinated; paraphyses bent to curly in upper parts, ±interwoven, unbranched to sparingly branched towards margins and columella, with moderately thickened tips; columellar structures well developed at maturity, to c. 200 µm wide, entire, conical, with a distinctly tapered tip, rarely overlaying the hymenium, then covered with greyish granules, strongly carbonised. Epihymenium indistinct. Asci 1-spored; tholus initially thick, becoming thin. Ascospores muriform, oblong-ellipsoidal, ±bent, with long tapered transversely septate ends, hyaline to yellowish, or becoming pale brownish, strongly amyloid, 170–300 × 25–50 µm, with numerous locules; locules ±angular, subglobose to irregular; transverse septa thin but distinct, regular; ascospore wall thin, thinly halonate; endospore thin. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish, C–, P+ yellow; containing psoromic acid (major), 2’-O-demethylpsoromic acid (minor to trace), subpsoromic acid (trace).
  Common on bark in tropical to warm-temperate rainforest and montane wet-sclerophyll forest at altitudes of 50–1200 m in eastern Qld and north-eastern N.S.W.; also in New Zealand.  
  Mangold et al. (2009)  

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

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