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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 pyrenuloides Zahlbr.

in H.Magnusson & A.Zahlbruckner, Ark. Bot. 31A(1): 46 (1943)

T: Wailuku, Maui, Hawaiian Islands, U.Faurie 676; isolecto: BM, fide M.E.Hale, Smithsonian Contr. Bot. 16: 25 (1974).

Ocellularia sticticans Hale, Bull. Brit. Mus. (Nat. Hist.), Bot. 8: 323 (1981). T: Southern Province, Sri Lanka, M.E.Hale 46254; holo: US.

  Thallus endophloeodal to epiphloeodal, to c. 100 µm thick, pale yellowish to greenish grey, dull to slightly glossy, smooth to uneven, continuous, sparingly rimose. True cortex continuous, to c. 15 µm thick, formed by irregular to periclinal hyphae, or the thallus with a discontinuous protocortex. Algal layer continuous or patchy; calcium oxalate crystals moderately large and clustered. Vegetative propagules not seen. Ascomata ±inconspicuous, to c. 0.7 mm diam., ±rounded, perithecioid or apothecioid in older stages, solitary or marginally fused, immersed to slightly emergent and hemispherical. Disc with the columella visible from above at maturity, epruinose to slightly pruinose, dark grey, free, entire. Pores formed by the thalline rim margin, rarely gaping, to c. 0.4 mm diam., ±rounded to irregular, thin, entire, becoming coarsely split to eroded with age, then the apex of the proper exciple becoming visible from above as a brownish or dark grey line, often with a paler pruinose ring; thalline rim incurved, sometimes erect. Proper exciple fused, thin below, thick and dark yellow-brown to brown internally, dark brown to carbonised marginally and above, non-amyloid. Hymenium to c. 100 µm thick, not inspersed, conglutinated; paraphyses ±bent, slightly interwoven, unbranched, with slightly thickened tips; columellar structures well-developed, to 400 µm wide, entire, carbonised, covered by few greyish or brownish granules. Epihymenium hyaline, rarely with greyish granules. Asci 8-spored; tholus initially thick, thin when mature. Ascospores transversely septate, oblong to ellipsoidal, with ±rounded to narrowly rounded ends, hyaline, strongly amyloid, 10–30 × 5–8 µm, with 4–9 locules; locules ±rounded to slightly angular, subglobose to oblong or lentiform; end cells conical to hemispherical; septa moderately thin, regular; ascospore wall thick, non-halonate; endospore thin. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish → brown, C–, P+ orange; containing stictic acid (major), constictic acid (trace), consalazinic acid (trace), α-acetylconstictic acid (trace), hypostictic acid (trace), cryptostictic acid (trace), α-acetylhypoconstictic acid (trace).
  A rare, corticolous species in mangroves in south-eastern Qld; pantropical.  
  Mangold et al. (2009)  

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

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