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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 lepadodes Tuck.

Proc. Amer. Acad. Arts Sci. 5: 405 (1862)

Leptotrema lepadodes (Tuck.) Zahlbr., Cat. Lich. Univ. 2: 636 (1923).

T: Filanthropia, Cuba, C.Wright s.n.; lecto: FH-TUCK n.v., fide M.E.Hale, Smithsonian Contr. Bot. 38: 52 (1978).

Thelotrema monosporum var. patulum Nyl., Acta Soc. Sci. Fenn. 7: 452 (1863); Leptotrema patulum (Nyl.) Müll.Arg., Bull. Herb. Boissier 3: 315 (1895). T: Nova Granata [Colombia], 1860, A.Lindig s.n.; lecto: H-NYL 22715, fide M.E.Hale, Smithsonian Contr. Bot. 38: 52 (1978); isolecto: H-NYL 22717.

Thelotrema disciforme Leight., Trans. Linn. Soc. London 27: 170 (1869); Phaeotrema disciforme (Leight.) Hale, Smithsonian Contr. Bot. 16: 29 (1974). T: Central Prov., Ceylon [Sri Lanka], G.H.K.Thwaites(CL 128 p.p.); lecto: BM, fide A.Frisch, K.Kalb & M.Grube, Biblioth. Lichenol. 92: 300 (2006); isolecto: H-NYL 3851.

Leptotrema aemulum Müll.Arg., Bull. Herb. Boissier 3: 316 (1895). T: Qld, locality unknown, 1887, C.Knight 295; lecto: G, fide M.E.Hale (in herb., 1972).

Leptotrema bisporum Szatala, Ann. Mus. Nat. Hungar., n.s., 7: 30 (1956). T: Berlinhafen [Aitape], Seleo I., Papua New Guinea, L.Biró 254; holo: BP.

  Thallus endophloeodal to epiphloeodal, to c. 150 µm thick, pale grey to yellowish grey, dull to somewhat glossy, smooth to uneven, continuous, usually not rimose. Protocortex discontinuous, to c. 15 µm thick, or the thallus ecorticate. Algal layer poorly developed, continuous or not; calcium oxalate crystals abundant, rarely sparse, usually small and scattered. Vegetative propagules not seen. Ascomata conspicuous or not, to c. 0.9 mm diam., ±rounded, apothecioid, ±sessile, solitary to marginally fused, becoming ±emergent, hemispherical to urceolate. Disc becoming partly visible from above, pale greyish to dark grey, distinctly pruinose. Pores usually broad or gaping, to c. 0.7 mm, ±rounded to rarely rounded-irregular, entire to slightly split; proper exciple apically to completely visible from above, off-white, occasionally shrunken, incurved to rarely erect. Thalline rim margin ±rounded, broad to gaping, entire to somewhat split or eroded, thin to thick, incurved, rarely slightly erect; thalline rim concolorous with the thallus, occasionally darker. Proper exciple becoming free, thin, mainly hyaline internally, pale to dark brown marginally, sometimes amyloid at the base. Hymenium to c. 200 µm thick, not inspersed, conglutinated; paraphyses parallel or slightly interwoven, unbranched, the tips unthickened to slightly thickened; lateral paraphyses inconspicuous, to c. 20 µm long; columellar structures absent. Epihymenium hyaline, with fine to coarse greyish granules and small crystals. Asci 2–8-spored; tholus initially thick, thin when mature. Ascospores submuriform to muriform, fusiform or clavate, rarely cylindrical, with ±rounded to subacute ends, hyaline to slightly brown at early maturity, darkening, non-amyloid to faintly or moderately amyloid, 40–100 × 10–25 (–30) µm, with c. 12–20 (–22) × 1–5 (–6) locules; locules ±rounded, subglobose to lentiform or oblong; end cells hemispherical to conical; transverse septa thin to thick, regular; ascospore wall initially thin, thicker at maturity, with a thin smooth to somewhat irregular halo; endospore thick. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Corticolous in mangroves and coastal forest 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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