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 | ||
| Chroodiscus australiensis Vězda & Lumbsch | ||
in H.T.Lumbsch & A.Vězda, Nova Hedwigia 50: 246 (1990) T: Souita Falls, Atherton Tableland, Qld, 16 Aug. 1987, H.T.Lumbsch 5437/17ei; holo: F; iso: Herb. Vězda. |
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| Thallus to c. 40 µm thick, pale greenish, dull to glossy, smooth, continuous, non-rimose. Protocortex to c. 10 µm thick. Algal layer well developed, continuous; calcium oxalate crystals abundant, small to moderately large, forming a ±continuous layer beneath the algae. Vegetative propagules not seen. Ascomata conspicuous, to c. 0.3 mm diam., ±rounded, solitary to marginally slightly fused, immersed to slightly raised. Disc completely visible from above, bright orange to reddish orange, epruinose. Proper exciple not visible from above; thalline rim margin thin, entire to slightly split, ±distinctly lobed when young, becoming eroded, pale orange, slightly incurved to erect, rarely recurved. Proper exciple fused, pale orange, non-amyloid. Hymenium to c. 50 µm thick, pale orange, moderately conglutinated. Epihymenium pale orange to rust-red, with rather small rust-red crystals. Ascus tholus initially thin, not visible at maturity. Ascospores transversely septate, ellipsoidal to more often fusiform, with narrowly rounded to subacute ends, 7–10 × 2–3 µm, with 2 (–3) locules; locules mostly conical; internal locule angular in 3-locular ascospores; septa thin; endospore absent. CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), hypostictic acid (major); ascomata K+ purplish, containing an unknown anthraquinone. |
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| Occurs on leaves in rainforest in north-eastern Qld, at altitudes to 700 m; pantropical. | ||
| Mangold et al. (2009) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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