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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
Ocellularia cruentata (Mont.) Hafellner & Magnes

in M.Magnes, Biblioth. Mycol. 165: 119 (1997)

Stictis cruentata Mont., Ann. Sci. Nat., Bot., sér. 4,3: 96 (1855).

T: French Guiana, F.M.R.Leprieur 805; holo: PC n.v.

Arthothelium puniceum Müll.Arg., Hedwigia 32: 133 (1893); — Thelotrema puniceum (Müll.Arg.) Makhija & Patw., Trop. Bryol. 10: 213 (1995); — Chapsa punicea (Müll.Arg.) Cáceres & Lücking, in M.E.Cáceres, Libri Bot. 22: 54 (2007). T: Brisbane, Qld, 1891, F.M.Bailey 369; holo: G.

Thelotrema rhododiscum Homchantara & Coppins, Lichenologist 34: 135 (2002). T: Khao Yai Natl Park, Nakhon Ratchasima, Thailand, 5 Nov. 1997, N.Homchantara 9676a; holo: RAMK; iso: E.

  Thallus endophloeodal to epiphloeodal, to c. 100 µm thick, indistinct to pale olive, ±glossy, smooth, continuous, non-rimose. True cortex continuous, to 60 µm thick, yellowish, consisting of irregular hyphae, often with substratum inclusions, occasionally poorly developed. Algal layer weakly to moderately well developed, discontinuous; calcium oxalate crystals absent. Vegetative propagules not seen. Ascomata conspicuous, to c. 1.2 mm diam., ±rounded; fused ascomata appearing irregular to sparingly branched, perithecioid to apothecioid, but usually distinctly chroodiscoid in younger stages due to the closed inner thalline rim layer resembling a disc, erumpent, solitary to fused or somewhat clustered, immersed. Disc rarely becoming partly visible from above, greyish brown and pruinose. Thalline rim distinctly bilayered. Inner layer with the pore formed by the thalline rim margin, to c. 0.2 mm diam., irregular, distinctly split or eroded, then, or in more open ascomata, the apex of the proper exciple becoming visible as a dark brown to blackish line, incurved, covered by a conspicuous deep red to purplish, rarely pale reddish to whitish pruina. Outer layer ±regularly lobed and distinctly Geaster-like, becoming erect to recurved, occasionally eroded or lacking, internally similar to the inner thalline rim layer, externally resembling the thallus, but usually appearing more reddish. Proper exciple fused, moderately thin, brownish internally to predominantly and distinctly carbonised, usually not distinguishable from the inner thalline rim layer, non-amyloid. Hymenium to c. 160 µm thick, not inspersed, strongly conglutinated; paraphyses straight to slightly bent, parallel to slightly interwoven, unbranched, with moderately thickened irregular tips; columellar structures absent. Epihymenium brownish, with greyish brown granules. Asci 8-spored; tholus thick when mature. Ascospores submuriform to muriform, oblong to slightly ellipsoidal, with rounded ends, hyaline, non-amyloid, 15–25 × 8–12 µm, with 4–6 × 1–3 (–4) locules; locules ±rounded to slightly angular, mostly irregular; end cells hemispherical; transverse septa thick, regular or irregular; ascospore wall thin, initially with a thick halo; endospore thick. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, P–; no compounds detectable by TLC. Ascomata K+ greenish; containing an unknown, deep red to purplish pigment (possibly coronatoquinone) [greyish spot after charring (Rf 11 in solvent system B’)]
  Rare on bark in south-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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