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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 pachysporum Nyl.

Bull. Soc. Linn. Normandie, sér. 2, 2: 72 (1868)

Phaeotrema pachysporum (Nyl.) Zahlbr., Cat. Lich. Univ. 2: 609 (1923).

T: New Caledonia, J.A.I.Pancher s.n.; holo: H-NYL22747.

Thelotrema exalbidum Stirt., Proc. Roy. Philos. Soc. Glasgow 13: 184 (1881); Leptotrema exalbidum (Stirt.) Zahlbr., Cat. Lich. Univ. 2: 634 (1923). T: Assam, India, 3 Feb. 1879, A.Watt s.n.; lecto: BM, fide M.E.Hale, Smithsonian Contr. Bot. 16: 29 (1974); isolecto: GLAM.

Thelotrema galactinum Vain., Dansk Bot. Ark. 4(11): 24 (1926); Phaeotrema galactinum (Vain.) Zahlbr., Cat. Lich. Univ. 8: 245 (1932). T: Malvapam [Maloapam], Mexico, Liebmann 7712; lecto: C, fide M.E.Hale, Smithsonian Contr. Bot. 16: 29 (1974).

Thelotrema limae Vain., Bol. Soc. Brot., sér. 2, 6: 150 (1929); Phaeotrema limae (Vain.) Zahlbr., Cat. Lich. Univ. 10: 216 (1939). T: Palma, Mozambique, 1916, A.Pires de Lima 38; holo: TUR-V 34808.

Thelotrema palmense Vain., Bol. Soc. Brot., sér. 2, 6: 150 (1929); Phaeotrema palmense (Vain.) Zahlbr., Cat. Lich. Univ. 10: 216 (1939). T: Palma, Mozambique, 1916, A.Pires de Lima 78; lecto: TUR-V 34810, fide G.Salisbury, Lichenologist 5: 270 (1972)

  Thallus endophloeodal, to c. 80 µm thick, pale grey to pale yellowish grey, dull, rarely slightly glossy, uneven, continuous, non-rimose to slightly rimose, ecorticate. Algal layer discontinuous and poorly developed; calcium oxalate crystals abundant, small. Vegetative propagules not seen. Ascomata inconspicuous, to c. 1 mm diam., apothecioid, ±rounded, solitary, immersed to usually ±emergent, hemispherical. Disc partly visible from above, greyish, coarsely pruinose. Pores moderately wide to gaping, to c. 0.7 mm diam., ±rounded to slightly irregular, the apical to upper parts of the proper exciple visible from above, free, largely entire, rarely slightly jagged, off-white, predominantly incurved, occasionally slightly shrunken. Thalline rim margin thin, ±rounded, entire to slightly split, often becoming eroded in older ascomata, concolorous with the thallus to brownish in eroded ascomata due to the protruding substratum; thalline rim concolorous to greyish brown in thinner thalli, incurved. Proper exciple free, thin, hyaline internally, yellowish brown to greyish brown or dark brown marginally, occasionally incorporating small calcium oxalate crystals, rarely faintly amyloid at the base. Hymenium to c. 200 µm thick, not inspersed, conglutinated; paraphyses slightly bent and interwoven, unbranched, the tips slightly thickened, somewhat irregular; lateral paraphyses inconspicuous, to c. 25 µm long; columellar structures absent. Epihymenium hyaline, with greyish or brownish granules. Asci 4–8-spored; tholus thick. Ascospores transversely septate, rarely with 1 longitudinal septum, clavate to fusiform, with narrowly rounded to subacute ends, brown, weakly amyloid, 30–75 × 10–15 µm, with 8–18 (–20) × 1 (–2) locules; locules ±rounded, mostly oblong to lentiform; septa thin to thick, regular; ascospore wall thick, halonate. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Occurs on bark in mangroves, sclerophyll forest, grassland and, rarely, in rainforest in northern N.T. and eastern Qld; a pantropical species.  
  Mangold et al. (2009)  

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

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