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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
Chapsa asteliae (Kantvilas & Vězda) Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 653 (2009)

Chroodiscus asteliae Kantvilas & Vězda, Lichenologist 32: 328 (2000).

T: southern foothills of Mt Curly, Tas., alt. 900 m, 3 Feb. 1985; G.Kantvilas & S.J.Jarman 38/85; holo: HO n.v.; iso: Herb. Vězda n.v., BM.

  Thallus immersed to superficial, to c. 200 µm thick, pale grey to pale tan-grey, slightly glossy, smooth, continuous to slightly verrucose, non-rimose. True cortex ±continuous, to c. 30 µm thick, composed of periclinal hyphae. Algal layer ±continuous, poorly developed; calcium oxalate crystals absent. Vegetative propagules not seen. Ascomata conspicuous, to c. 1.5 mm diam., ±rounded, apothecioid or becoming indistinctly chroodiscoid, initially erumpent, becoming sessile, solitary to marginally fused, regenerating, becoming markedly emergent, depressed-subglobose to urceolate. Disc usually partly visible from above, pale brownish, becoming dark grey, epruinose. Proper exciple usually not visible from above, sometimes becoming visible apically as a brownish line; thalline rim margin small to gaping, irregular to stellate; thalline rim becoming distinctly layered, radially split and ±lobed, concolorous with the thallus or slightly darker, internally incurved to, rarely, slightly erect; outer layers becoming erect, rarely recurved. Proper exciple usually fused, rarely apically exposed, thin, hyaline internally to pale brownish or greyish marginally, sometimes dark brown apically, non-amyloid. Hymenium to c. 150 µm thick, moderately conglutinated; paraphyses thick, ±parallel, with swollen tips; lateral paraphyses inconspicuous, to 30 µm long. Hypothecium conspicuous and thick, hyaline, strongly gelatinous and slightly amyloid. Epihymenium hyaline, becoming distinctly brownish, rarely with a few greyish granules. Asci 4–6 (–8)-spored; tholus initially thin, not visible at maturity. Ascospores submuriform to muriform, oblong to ±fusiform, with rounded to narrowly rounded ends, hyaline, weakly amyloid, 30–60 × 10–15 µm, with 8–16 × 1–4 locules; locules large, mostly irregular-rounded to somewhat angular, subglobose or often elongate; transverse septa thick, ±regular; ascospore wall and endospore thick, with a thin to thick halo.
CHEMISTRY: Thallus K+ yellowish brown, C–, P+ orange-red; containing succinprotocetraric acid (major), protocetraric acid (trace), fumarprotocetraric acid (trace).
  Locally common on dead leaves of Astelia alpina in subalpine to alpine heathland in western Tas. (900–1080 m); endemic.  
  Mangold et al. (2009)  

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

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