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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 inturgescens (Müll.Arg.) Mangold

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

Thelotrema inturgescens Müll.Arg., Hedwigia 32: 131 (1893).

T: Brisbane, Qld, 1891, F.M.Bailey 1552;holo: G; iso: BRI (AQ721236), US.

  Thallus endophloeodal to epiphloeodal, to c. 300 µm thick, pale greyish to greenish grey or pale yellowish, dull to slightly glossy, smooth, ±strongly verrucose, ±richly rimose to areolate. True cortex continuous or discontinuous, to c. 40 µm thick, formed by periclinal or irregular hyphae, rarely replaced by a discontinuous protocortex. Algal layer moderately well developed and ±continuous; calcium oxalate crystals abundant, large and clustered. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.8 mm diam., ±rounded, perithecioid, solitary to marginally fused, immersed to distinctly emergent, then ±hemispherical. Disc not visible from above. Pores minute, to c. 0.15 mm diam., ±rounded to irregular, entire to slightly split; apex of the proper exciple visible from above in younger stages, becoming evanescent (then the pores formed by the thalline rim margin), fused to partly free, sometimes slightly sunken, epruinose, whitish-translucent to pale greyish or brownish, incurved. Thalline rim margin small, ±rounded, moderately thick, entire to slightly split, concolorous with the thallus to pale yellowish or yellowish brown; thalline rim incurved. Proper exciple fused to apically slightly detached or distinctly free in endophloeodal parts, moderately thin, hyaline to pale yellowish internally to orange marginally, in older stages often brown to greyish apically, non-amyloid. Hymenium to c. 500 µm thick, not inspersed, weakly conglutinated; paraphyses thin, ±bent to curly distally, ±interwoven, unbranched to slightly branched towards margins, with unthickened to slightly thickened tips; columellar structures absent. Epihymenium indistinct. Asci 1-spored; tholus not apparent, initially with thick lateral ascus walls, becoming thin. Ascospores muriform, fusiform or bifusiform to oblong-fusiform, often ±irregular, with ±rounded to  subacute ends, hyaline to yellowish or brownish at late maturity, strongly amyloid, 150–350 (–400) × 30–50 (–55) µm, with numerous locules; locules ±rounded to angular, subglobose to irregular; transverse septa thin, indistinct, regular to slightly irregular; ascospore wall thin, non-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).
  Corticolous in rainforest in eastern Qld, at altitudes to 1130 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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