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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 lepadinum (Ach.) Ach.

Methodus 132 (1803)

Lichen lepadinus Ach., Lich. Suec. Prodr. 30 (1798).

T: Ostrogothia, Sweden, E.Acharius s.n.; lecto: UPS-ACH, fide O.W.Purvis, P.M.Jørgensen & P.W.James, Biblioth. Lichenol. 58: 344 (1995).

Thelotrema aemulans Kremp., Verh. Zool.-Bot. Ges. Wien 26: 453 (1876); Leptotrema aemulans (Kremp.) Müll.Arg., Bull. Herb. Boissier 2, App. 1: 75 (1894). T: New Zealand, C.Knight s.n.; holo: M.

Thelotrema flavescens Darb., in Nordenskjöld, Wiss. Ergebn. Schwed. Südpolarexped. 1901–1903, 4(4): 6 (1912). T: Navarin Island, Tierra del Fuego, Chile, 4 Mar. 1902, C.Skottsberg s.n.; holo: S.

Thelotrema obconicum Räsänen,Suom. Elain-ja Kasvit. Seuran Van. Tiedon. Pöytäkirjat 3: 184 (1949). T: Katoomba, N.S.W., Sept. 1889, F.R.M.Wilson s.n.; holo: H.

  Thallus endophloeodal to epiphloeodal, to c. 300 µm thick, pale yellowish brown to pale greyish green or pale olive, dull to slightly glossy, smooth, continuous to strongly verrucose, rimose. Protocortex discontinuous, to c. 30 µm thick, occasionally becoming a distinctly conglutinated true cortex of irregular to periclinal hyphae near the thalline rim of ascomata. Algal layer ±well developed, continuous, or discontinuous due to calcium oxalate crystal inclusions; calcium oxalate crystals ±abundant, small to large, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 2 mm diam., ±rounded to slightly irregular, apothecioid, sessile, solitary or occasionally marginally fused, emergent, hemispherical to urceolate or subglobose, the surface similar to that of the thallus or more glossy. Disc occasionally becoming partly visible from above, greyish to brownish, indistinctly pruinose. Pores small to moderately broad, to c. 0.5 mm diam., ±rounded to irregular, entire to split, at least the apex of the proper exciple visible from above, free, usually shrunken, apically pale, bright yellowish towards the base, incurved. Thalline rim margin thin to thick, entire to somewhat eroded, ±rounded, rarely slightly elongate, usually becoming wide to gaping, incurved to somewhat erect, usually concolorous with the thallus. Proper exciple free, thin, hyaline to pale yellowish internally, yellowish to brownish or greyish marginally, non-amyloid. Hymenium to c. 200 µm thick, not inspersed, moderately conglutinated; paraphyses parallel to slightly interwoven, unbranched, the tips slightly thickened; lateral paraphyses usually conspicuous, to c. 40 µm long; columellar structures absent. Epihymenium hyaline, with greyish or brownish granules and small crystals. Asci 4–8-spored; tholus thick, usually not visible at maturity. Ascospores muriform at maturity, mostly fusiform to ellipsoidal, rarely clavate, the ends narrowly rounded to subacute, hyaline, non-amyloid to faintly amyloid, 60–140 × 15–30 µm, with 12–22 × 1–6 locules; locules mostly ±rounded, subglobose to depressed-subglobose, rarely lentiform; end cells usually subglobose to slightly conical; septa thin to thick, distinct, ±regular; ascospore wall thick, often with a thin to thick irregular halo; endospore slightly thickened. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Occurs in south-western W.A., south-eastern Qld, eastern N.S.W., Vic. and Tas.; corticolous in rainforest, wet- and dry-sclerophyll forest, heath and scrub, Karri forest and swampland, at altitudes to 1500 m. This species has a subcosmopolitan distribution including Lord Howe Island.  
  Mangold et al. (2009)  

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

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