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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 porinoides Mont. & Bosch

in F.A.W.Miquel, Pl. Junghuhn. 4: 484 (1855)

Thelotrema cavatum var. porinoides (Mont. & Bosch) Nyl., Mém. Soc. Sci. Nat. Cherbourg 5: 118 (1858); — Ocellularia porinoides (Mont. & Bosch) Zahlbr., Cat. Lich. Univ. 2: 599 (1923).

T: Java, [Indonesia], F.W.Junghuhn s.n.; lecto: L, fide M.E.Hale, Smithsonian Contr. Bot. 16: 20 (1974); isolecto: G.

Thelotrema albidiforme Leight., Trans. Linn. Soc. London 27: 170 (1869); Ocellularia albidiformis (Leight.) Zahlbr., Ann. Mycol. 14: 50 (1916). T: Ceylon [Sri Lanka], G.H.K.Thwaites 19; holo: BM.

Thelotrema exanthismocarpum Leight., Trans. Linn. Soc. London 27: 169 (1869); Ocellularia exanthismo-carpa (Leight.) Zahlbr., Cat. Lich. Univ. 2: 590 (1923). T: Ceylon [Sri Lanka], G.H.K.Thwaites 97; lecto: BM, fide M.E.Hale, Smithsonian Contr. Bot. 16: 29 (1974).

Thelotrema obovatum Stirt., Trans. Glasgow Soc. Field Nat. 1: 21 (1873); Ocellularia obovata (Stirt.) Müll.Arg., Bull. Herb. Boissier 2, App. 1: 74 (1894). T: Wellington, New Zealand, J.Buchanan 57b; lecto: GLAM, fide D.J.Galloway, Flora of New Zealand Lichens 576 (1985); isolecto: BM.

Ocellularia platychlamys Müll.Arg., Bull. Herb. Boissier 3: 313 (1895). T: Emundi [Eumundi], Blackall Range, Qld, F.M.Bailey s.n.; lecto: G, fide A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 658 (2009).

Thelotrema homothecium Vain., Ann. Acad. Sci. Fenn., ser. A, 15(6): 190 (1921); Ocellularia homothecia (Vain.) Zahlbr., Cat. Lich. Univ. 2: 593 (1923). T: Irosin, Luzon, Philippines, A.D.E.Elmer 14852 p.p.; holo: TUR-V; iso: US.

  Thallus predominantly endophloeodal, epiphloeodal and up to c. 30 µm thick near ascomata, greyish green, dull to slightly glossy, smooth to uneven (due to the protuberant substratum), continuous to slightly verruculose, non-rimose. Protocortex continuous or discontinuous, to c. 30 µm thick. Algal layer well developed, continuous or discontinuous; calcium oxalate crystals usually common, small to large, often clustered. Vegetative propagules not seen. Ascomata ±conspicuous, to c. 0.9 mm diam., ±rounded, apothecioid, sessile, solitary, occasionally fused, usually emergent, rarely subglobose with a constricted base, usually hemispherical to broadly cylindrical or conical with a depressed apex. Disc usually not visible from above, pale greyish, distinctly pruinose. Pores small to moderately wide, to c. 0.3 mm diam., ±rounded, entire to split, the proper exciple completely to apically visible from above, free, apically pale, darker towards the base, incurved to slightly erect, occasionally slightly shrunken. Thalline rim margin thick, ±rounded, entire to split, lacerate or eroded, often slightly to distinctly layered, incurved to erect, mostly whitish or paler than the thallus, occasionally slightly pruinose; thalline rim surface often irregular-verrucose to verruculose. Proper exciple free, ±thin, hyaline internally, greyish brown marginally, often covered with greyish granules, non-amyloid to faintly amyloid at the base. Hymenium to c. 220 µm thick, not inspersed, moderately conglutinated; paraphyses interwoven, unbranched, the tips slightly thickened; lateral paraphyses conspicuous, to c. 40 µm long; columellar structures absent. Epihymenium hyaline, with greyish or brownish granules and small crystals. Asci 8-spored; tholus initially thick, not visible at maturity. Ascospores transversely septate, oblong-fusiform to, occasionally, oblong-clavate, the ends usually narrowly rounded, rarely subacute, hyaline, strongly amyloid, 40–150 (–170) × 15–22 µm, with 14–26 (–28) locules; locules ±rounded to slightly angular in younger stages, later subglobose to mostly lentiform; end cells ±conical; septa thin to thick, regular; ascospore wall very thick, thinly halonate. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing constictic acid (major), stictic acid (major), hypostictic acid (minor), hypoconstictic acid (trace), cryptostictic acid (trace), a-acetylhypoconstictic acid (trace).
  Occurs on bark in lowland to montane rainforest in eastern Qld; pantropical.  
  Mangold et al. (2009)  

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

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