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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 subadjectum Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 658 (2009)

T: Shire picnic area to National Park boundary, Mt Bunya, south of park, Qld, 18 June 1983, M.E.Hale 831440; holo: US.

  Thallus endophloeodal to epiphloeodal, to c. 100 µm thick, pale greyish to pale greyish green, dull to somewhat glossy, slightly pruinose to uneven, continuous, sparingly rimose or not, ecorticate. Algal layer poorly to well developed, ±continuous; calcium oxalate crystals often lacking, or sparse, then small and frequently clustered. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.6 mm diam., ±rounded, apothecioid, usually solitary, rarely marginally fused, usually immersed. Disc usually not visible from above, pale greyish to whitish, pruinose. Pores small, to c. 0.15 mm diam., ±rounded to irregular, entire to slightly split, the apex of the proper exciple visible from above, whitish, incurved, rarely shrunken. Thalline rim margin thick, ±rounded, entire to slightly split, occasionally ±funnel-shaped, concolorous with the thallus to whitish. Proper exciple becoming free, thick, hyaline internally, pale brownish to greyish marginally, often incorporating substratum material, apically often covered by greyish granules, usually amyloid at the base and at the margin of the subhymenium. Hymenium to c. 120 µm thick, not inspersed, conglutinated; paraphyses parallel to slightly interwoven, unbranched, the tips slightly thickened; lateral paraphyses conspicuous, to c. 25 µm long; columellar structures absent. Epihymenium hyaline, with fine to coarse greyish granules. Asci 8-spored; tholus initially thick, thin when mature. Ascospores submuriform to muriform, mostly oblong to somewhat fusiform or clavate, with ±rounded to narrowly rounded ends, hyaline, faintly amyloid, 25–35 × 8–10 µm, with 10–14 × 1–4 locules; locules ±rounded to slightly angular, subglobose or irregular to more often ±oblong; immature ascospores with large, conical end cells, otherwise hemispherical; transverse septa thick, regular; ascospore wall thick, distinctly halonate; endospore thick. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  A rare, corticolous endemic in rainforest in north-eastern and south-eastern Qld.  
  Mangold et al. (2009)  

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

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