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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 reticulata Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 656 (2009)

T: Mt Nardi–Mt Matheson track, Nightcap Natl Park, N.S.W., 28°32’S, 153°17’E, alt. 800 m, on bark in subtropical rainforest, 9 Mar. 2005, A.Mangold 22b; holo: CANB; iso: F, NSW.

  Thallus endophloeodal to epiphloeodal, to c. 400 µm thick, pale greenish to yellowish grey, dull, smooth to rough or slightly pruinose, continuous to verrucose, usually non-rimose. Thallus ecorticate or with an indistinct discontinuous protocortex. Algal layer continuous; calcium oxalate crystals abundant, large, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous at maturity, to c. 0.8 mm diam., ±rounded to ±irregular, apothecioid, solitary to fused, immersed to emergent, then hemispherical or urceolate. Disc with the columella visible from above, pruinose, off-white to greyish, free or fused with the thalline rim, entire to reticulate or cracked in older stages. Pores formed by the thalline rim margin, rarely gaping, to c. 0.5 mm diam., ±rounded to irregular, entire to coarsely split or eroded, then the apex of the proper exciple becoming visible from above as a medium to dark brownish line, moderately thick, concolorous with the thallus or brighter; thalline rim incurved to becoming erect. Proper exciple fused, moderately thick, orange-brown to brown internally, dark brown or carbonised marginally and above, occasionally amyloid at the base. Hymenium to c. 100 µm thick, not inspersed, moderately conglutinated; paraphyses ±bent, ±interwoven, unbranched, with slightly thickened tips; columellar structures well-developed, to 400 µm wide, replacing most of the hymenium, entire to complex, carbonised basally, brownish above, not covered with granules. Epihymenium hyaline, with greyish or brownish granules. Asci 8-spored; tholus initially thick, thin when mature. Ascospores transversely septate, oblong to ellipsoidal, with narrowly to broadly rounded ends, hyaline to pale brownish (post-mature ascospores), strongly amyloid, 10–15 (–18) × 4–6 µm, with 4–6 locules; locules ±rounded to slightly angular, ±lentiform to oblong; end cells the same shape or hemispherical; septa moderately thick, ±regular; ascospore wall and endospore moderately thick; wall sometimes faintly halonate. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish → brown, C–, P+ orange; containing stictic acid (major), constictic acid (major to minor), α-acetylhypoconstictic acid (minor to trace), hyposalazinic acid (minor to trace), cryptostictic acid (trace), α-acetylconstictic acid (trace).
  An uncommon, corticolous endemic in rainforest in north-eastern Qld and north-eastern N.S.W.; occurs at altitudes of 530–800 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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