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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
Thelotrema crespoae Mangold, Elix & Lumbsch

in H.T.Lumbsch, A.Mangold, M.P.Martín & J.A.Elix, Austral. Syst. Bot. 21: 223 (2008)

T: Wooroi State Forest Park, W of Teewantin, Qld, on palm in secondary rainforest, 6. Aug. 1983, M.E.Hale 832786; holo: US.

  Thallus endophloeodal to epiphloeodal, to c. 150 µm thick, pale greyish green to greyish, dull, uneven, continuous, often with the substratum protruding, non-rimose. Cortex and pseudocortex absent. Algal layer poorly to moderately well developed, discontinuous; calcium oxalate crystals usually abundant, small, scattered, rarely clustered. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.8 mm diam., ±rounded, initially perithecioid, becoming apothecioid, solitary, moderately to distinctly emergent at maturity, hemispherical to urceolate. Disc usually not visible from above, greyish, pruinose. Pores small, to c. 0.4 mm diam., ±rounded to slightly irregular, entire to split; apex of the proper exciple becoming visible from above, often somewhat shrunken, off-white, pale brownish towards the base, incurved to slightly erect. Thalline rim margin small, broadening and gaping with age, thin to thick, usually split, occasionally ragged or somewhat lacerate; thalline rim incurved to slightly erect, concolorous with the thallus, rarely brownish. Proper exciple becoming completely free, usually thin, hyaline internally to pale brownish or yellowish brown marginally, apically sometimes with coarse greyish granules, non-amyloid. Hymenium to c. 300 µm thick, not inspersed, moderately conglutinated; paraphyses parallel to somewhat interwoven, unbranched, the tips slightly to distinctly thickened; lateral paraphyses inconspicuous, to c. 20 µm long; columellar structures absent. Epihymenium hyaline, with greyish granules. Asci 1-spored; tholus initially thick, not visible at maturity. Ascospores transversely septate, oblong-fusiform, with acute ends, initially appendiculate, becoming markedly tapered, hyaline, becoming brown, non-amyloid to distinctly amyloid at early maturity (just before initial pigmentation), 150–280 × 25–35 µm, with numerous locules; locules ±rounded to somewhat acute, oblong to lentiform; end cells sharply conical; septa thin to thickened at late maturity, regular; ascospore wall thick, non-halonate. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  A rare, endemic, corticolous species in lowland rainforest in south-eastern Qld and eastern N.S.W.  
  Mangold et al. (2009)  

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

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