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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
Melanotopelia rugosa (Kantvilas & Vězda) Lumbsch & Mangold

in A.Mangold, M.P.Martín, K.Kalb, R.Lücking & H.T.Lumbsch, Lichenologist 40: 44 (2008)

Topeliopsis rugosa Kantvilas & Vězda, Lichenologist 32: 351 (2000).

T: Reservoir Lakes, Tas., alt. 800 m, on peat at lakeshore in subalpine moorland, 1986, G.Kantvilas 177/86; holo: HO; iso: Herb. Vězda n.v.

  Thallus to c. 80 µm thick, off-white, dull to glossy, smooth, continuous, non-rimose. True cortex continuous or discontinuous, to c. 30 µm thick, formed by periclinal hyphae. Algal layer poorly developed, discontinuous; calcium oxalate crystals absent. Prothallus not apparent. Vegetative propagules not seen. Ascomata conspicuous, to c. 1 mm diam., sessile, solitary or marginally slightly fused, often growing successively, strongly emergent, initially subglobose, becoming urceolate. Disc often becoming partly visible from above, whitish to pale brownish, epruinose, often becoming markedly cracked or eroded. Proper exciple not visible from above. Pores small to gaping, to c. 0.6 mm diam., initially irregularly stellate, becoming ±rounded; pore margin entire to slightly split. Thalline rim initially concentrically rugose at the apex, whitish to pale greyish, later only slightly rugose, finally entire, remaining whitish to pale greyish, markedly contrasting with the otherwise dark grey to blackish thalline rim, incurved. Proper exciple hyaline internally, dark brown to carbonised at the margin. Hymenium to c. 350 µm thick; paraphyses straight, parallel, unbranched, with slightly thickened tips; lateral paraphyses conspicuous, not clearly separated from the proper exciple, to c. 50 µm long. Epihymenium hyaline to reddish or dark brown. Asci 1–4-spored; tholus initially thick, thin when mature. Ascospores muriform, fusiform to irregularly fusiform, with narrowly rounded ends, hyaline, yellowish to pale brownish in old or decayed ascospores, non-amyloid to faintly amyloid, 80–230 × 20–45 µm, with numerous locules; locules ±rounded to somewhat angular, mostly irregular; transverse septa distinct and regular in immature ascospores, becoming indistinct or lost; ascospore wall initially thick, becoming thin, occasionally with a thin halo; endospore thin. Pycnidia not seen.
CHEMISTRY: Chemistry: Thallus K+ yellowish to brown, C–, P+ orange; containing constictic acid (major), stictic acid (major), cryptostictic acid (trace). According to Kantvilas & Vězda (2000), some specimens lack secondary metabolites.
  Grows on bryophytes in subalpine moorland in south-western Tas. (750–1050 m), and on bark in montane rainforest in north-eastern Qld (1500 m); also known from the Auckland Islands and Campbell Island.  
  Mangold et al. (2009)  

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

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