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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 capetribulense Mangold

in H.T.Lumbsch, A.Mangold, M.P.Martín & J.A.Elix, Austral. Syst. Bot. 21: 221 (2008)

T: Myall Beach, Cape Tribulation area, Qld, 2003, H.T.Lumbsch & A.Mangold 19161x; holo: CANB; iso: BRI, F.

  Thallus endophloeodal to epiphloeodal, to c. 400 µm thick, pale greyish to pale greyish green, slightly glossy, smooth, distinctly verrucose, occasionally sparingly rimose. Protocortex ±discontinuous, to c. 30µm thick, patchily conglutinated and forming a true cortex of irregular to periclinal hyphae. Algal layer poorly developed, usually discontinuous due to crystal inclusions; calcium oxalate crystals abundant, small to large, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 0.7 mm diam., ±rounded, apothecioid, solitary to occasionally slightly fused marginally, usually distinctly emergent, mostly subglobose to urceolate, rarely broadly cylindrical, with a ±verrucose surface. Disc not visible from above, rarely becoming partly visible, pale brownish grey, indistinctly pruinose. Pores to c. 0.3 mm diam., ±rounded, entire to split; proper exciple completely to apically visible from above, becoming free, apically pale, darker towards the base, mainly incurved. Thalline rim margin thick, entire to somewhat split to slightly lacerate or eroded, often slightly layered, ±rounded, mostly whitish or brighter than the thallus, occasionally lightly pruinose, incurved to rarely erect. Proper exciple becoming free, ±thin, hyaline internally to pale yellowish brown marginally, amyloid at the base. Hymenium to c. 150 µm thick, not inspersed, moderately conglutinated; paraphyses interwoven, unbranched, the tips slightly thickened; lateral paraphyses usually conspicuous, to c. 30 µm long; columellar structures absent. Epihymenium hyaline, with greyish granules. Asci 8-spored; tholus initially thick, thin at maturity. Ascospores transversely septate, fusiform to more commonly clavate, with narrowly rounded to subacute ends, hyaline, moderately amyloid, 25–50 × 5–10 µm, with 6–14 locules; locules irregular and variable, ±rounded to moderately angular, subglobose to lentiform; end cells hemispherical to conical; septa thick, regular or ±irregular; ascospore wall thick, thinly halonate. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing constictic acid (major), stictic acid (major), hypostictic acid (major), hypoconstictic acid (trace), cryptostictic acid (trace).
  A rare, corticolous endemic in north-eastern Qld; occurs in mangroves and in rainforest to 700 m.  
  Mangold et al. (2009)  

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

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