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Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Thelotrema bicinctulum Nyl.

Ann. Sci. Nat., Bot., sér. 4, 15: 46 (1861)

T: New Caledonia, J.A.I.Pancher s.n.; lecto: H-NYL 22804a, fide A.Frisch, K.Kalb & M.Grube, Biblioth. Lichenol. 92: 282 (2006).

Thelotrema terebrans Nyl., Bull. Soc. Linn. Normandie, sér. 2, 7: 166 (1873); Ocellularia terebrans (Nyl.) Zahlbr., Cat. Lich. Univ. 2: 602 (1923); Myriotrema terebrans (Nyl.) Hale, Mycotaxon 11: 138 (1980). T: Andaman Islands, S.Kurz 80; lecto: H-NYL 22771, fide M.E.Hale, Bull. Brit. Mus. (Nat. Hist.), Bot. 8: 294 (1981); isolecto: UPS.

Ocellularia demersa Müll.Arg., Mém. Soc. Phys. Genève 29(8): 9 (1887), nom. nov. pro Pyrenula clandestina Fée, Essai Crypt. Écorc., Suppl. 83 (1837), nom. illeg. non P. clandestina Ach. (1814), nec T. clandestinum Fée (1837); Thelotrema albidulum Nyl., Mém. Soc. Sci. Nat. Cherbourg 5: 118 (1857), nom. inval. non T. albidulum Nyl. (1861); Thelotrema demersum (Müll.Arg.) G.Salisb., Nova Hedwigia 29: 408 (1978). T: “Regio tropica, habitat non raro supra cortices Crotonis cascarillae, L.”; lecto: G-Fée 207, fide G.Salisbury, Nova Hedwigia 29: 408 (1978); isolecto: H-NYL 22768, 22769.

Ascidium octoloculare C.Knight, in F.M.Bailey, Proc. Roy. Soc. Queensland 1: 152 (1884); Ocellularia octolocularis (C.Knight) Shirley, Proc. Roy. Soc. Queensland 6: 188 (1889); Porina octolocularis (C.Knight) C.Knight, in J.Shirley, Proc. Roy. Soc. Queensland 6: 183 (1889). T: Brisbane, Qld, F.M.Bailey 204; lecto: WELT, fide A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 657 (2009); isolecto: BRI (AQ721230, 720161).

  Thallus endophloeodal to epiphloeodal, to 500 (–800) µm thick, pale greyish green to pale yellowish grey or olive, dull to glossy, smooth to occasionally partly porous-uneven, continuous to verrucose, rimose or not, the upper thalline layers often partly flaking away and exposing the whitish medulla. True cortex continuous, occasionally discontinuous or lacking in large parts, to c. 35 µm thick, consisting of irregular to periclinal hyphae. Algal layer mostly ±well developed, continuous, sometimes becoming discontinuous due to large crystal inclusions; calcium oxalate crystals abundant, often almost occupying the lower levels of the thallus, variable in size, scattered or clustered; medulla whitish. Vegetative propagules not seen. Ascomata ±inconspicuous, to c. 0.4 mm diam., ±rounded, apothecioid, mostly solitary, rarely slightly fused, predominantly ±immersed. Disc often becoming partly visible from above, greyish, coarsely pruinose. Pores small, to c. 0.12 mm diam., ±rounded to somewhat irregular, the apex or upper levels of the proper exciple visible from above, free, entire to slightly split, occasionally ±jagged, off-white, mostly incurved, rarely somewhat erect, occasionally ±distinctly shrunken. Thalline rim margin thin, ±rounded to slightly irregular, entire to slightly split, concolorous with the thallus or paler, often somewhat raised; thalline rim incurved, concolorous with the thallus. Proper exciple free in the upper parts, thin and hyaline internally to pale yellowish to dark yellowish brown marginally, apically often covered by greyish granules, non-amyloid, occasionally amyloid at the base. Hymenium to c. 100 µm thick, not inspersed, moderately conglutinated; paraphyses straight to slightly bent, slightly interwoven, unbranched, the tips slightly thickened; lateral paraphyses often inconspicuous, to c. 25 µm long; columellar structures absent. Epihymenium hyaline, with greyish granules. Asci 8-spored; tholus initially thick, thinning or not visible at maturity. Ascospores transversely septate, narrowly ellipsoidal to fusiform or clavate, with ±rounded to subacute ends, hyaline, non-amyloid to faintly amyloid, 20–35 × 5–7 µm, with 8–11 locules; locules ±rounded to angular, predominantly oblong to lentiform or rectangular, with hemispherical to conical end cells; septa thin, regular; ascospore wall thin to thick, usually thinly halonate. Pycnidia not seen.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), constictic acid (minor to trace), hypostictic acid (minor to trace), a-acetylconstictic acid (trace), hypoconstictic acid (trace), cryptostictic acid (trace), a-acetylhypoconstictic acid (trace).
  Corticolous in northern N.T. and eastern Qld; occurs in rainforest, mangroves, coastal forest and wet-sclerophyll forest at altitudes to 800 m. Palaeotropical.  
  Mangold et al. (2009)  

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

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