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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
Chapsa indica A.Massal.

Atti Reale Ist. Veneto Sci. Lett. Arti, ser. 3, 5: 257 (1860)

T: Ceylon [Sri Lanka], locality unknown, coll. unknown; holo: VER n.v.

Thelotrema pycnophragmium Nyl., Sert. Lich. Trop. Labuan Singapore 5 (1891); — Ocellularia pycnophragmia (Nyl.) Zahlbr., Cat. Lich. Univ. 2: 599 (1923). T: Labuan, [Malaysia], 1879, S.Almquist s.n.; lecto: H-NYL 22679, fide A.Frisch, K.Kalb & M.Grube, Biblioth. Lichenol. 92: 100 (2006).

Thelotrema albescens Vain., Bol. Soc. Brot., ser. 2, 6: 152 (1929); — Ocellularia albescens (Vain.) Zahlbr., Cat. Lich. Univ. 10: 211 (1939). T: Palma, Mozambique, 1916, A.Pires de Lima 524; lecto: TUR-V 34793, fide G.Salisbury, Lichenologist 5: 273 (1972).

  Thallus mainly endophloeodal, to c. 50 µm thick, pale grey to pale greyish green, dull to slightly glossy, smooth to rough (due to the protuberant substratum), continuous, non-rimose. Cortex absent, the thallus rarely covered by a thin discontinuous protocortex to c. 10 µm thick. Algal layer poorly defined to moderately well developed, continuous or discontinuous; calcium oxalate crystals usually sparse, small to moderately large, scattered, rarely clustered. Vegetative propagules not seen. Ascomata conspicuous or inconspicuous, to c. 1.3 mm diam., ±rounded to irregular (fused ascomata sometimes appearing sparingly branched), chroodiscoid at maturity, erumpent, solitary or fused, immersed. Disc partly to entirely visible from above, greyish, usually distinctly whitish-pruinose. Proper exciple not visible from above to partly visible when becoming free; thalline rim split, distinctly lobed, rarely somewhat eroded; lobes large and thick, internally ±pruinose, whitish to somewhat brownish due to the protuberant substratum, concolorous with the thallus outside, erect to recurved. Exciple fused or partly free, thin to evanescent, colourless internally to yellowish or pale orange and often with substratum layers incorporated marginally, apically often covered with greyish granules, non-amyloid. Hymenium to c. 150 µm thick, weakly conglutinated; paraphyses ±straight, parallel to slightly interwoven, the tips moderately to distinctly thickened; lateral paraphyses inconspicuous, to c. 20 µm long. Epihymenium with greyish granules, rarely with small crystals. Asci 6–8-spored; tholus thick up to maturity. Ascospores transversely septate, oblong-fusiform, with narrowly rounded to subacute ends, hyaline, non-amyloid, 50–110 × 6–12 µm, with 20–35 locules; locules ±rounded to slightly angular, rarely subglobose to lentiform towards the ends, to predominantly oblong; end cells hemispherical to conical; septa thin, regular; ascospore wall thick, non-halonate; endospore thin to thick.
CHEMISTRY: Thallus K–, C–, P–; no compounds detectable by TLC.
  Occurs on bark in northern N.T.; pantropical.  
  Mangold et al. (2009)  

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

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