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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
Topeliopsis tasmanica (Kantvilas & Vězda) Mangold

in A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 659 (2009)

Chroodiscus australis subsp. tasmanicus Kantvilas & Vězda, Lichenologist 32: 334 (2000); — C. macrocarpus subsp. tasmanicus (Kantvilas & Vězda) D.J.Galloway, Australas. Lichenol. 49: 17 (2001).

T: Mt Geikie, Tas., alt. 1080 m, 5 Oct. 1998, G.Kantvilas 196/98; holo: HO.

  Thallus immersed to superficial, to c. 80 (–100) µm thick (near ascomata), hyaline to pale grey, dull, greyish-pruinose, continuous, non-rimose. Protocortex discontinuous, visible near ascomatal bases, to 20 µm thick. Algal layer discontinuous and poorly developed, but continuous and well developed at ascomatal bases; cells scattered in a thin layer of somewhat gelatinous hyphae or within the substratum; calcium oxalate crystals not seen. Vegetative propagules not seen. Ascomata conspicuous, to c. 1.2 mm diam., ±rounded, perithecioid when young, becoming apothecioid, sessile, solitary to occasionally marginally fused, distinctly emergent, initially subglobose, becoming urceolate to depressed-urceolate. Disc partly visible from above in older ascomata, orange-brown, becoming dark greyish brown, epruinose. Pores becoming broader with age, to c. 0.5 mm diam., irregular, usually stellate to somewhat rounded, initially opening as ±regularly radiating cracks, becoming deeply split, with a lobed pore margin; proper exciple not visible from above. Thalline rim coarsely lacerate, distinctly lobed, often slightly layered, rarely somewhat eroded, formed by off-white to pale brownish slightly pruinose coarse thallus fragments, incurved or becoming slightly erect. Proper exciple fused, very thick, hyaline internally, pale yellowish to pale greenish yellow marginally, weakly amyloid, pinkish (especially towards the base and the subhymenium); subhymenium conspicuous, very thick, concolorous with the proper exciple. Hymenium to c. 220 µm thick, strongly conglutinated; paraphyses parallel to slightly interwoven, the tips unthickened to slightly thickened; lateral paraphyses conspicuous, to c. 40 µm long. Epihymenium orange-brown, becoming more brownish with age, lacking granules. Asci 2–4-spored; tholus initially thick, thin at maturity. Ascospores muriform, ellipsoidal to fusiform, with ±rounded to narrowly rounded, rarely subacute, ends, hyaline, non-amyloid, 50–100 × 20–35 µm, with numerous locules; locules ±rounded to angular, irregular; transverse septa thin, initially indistinct and irregular, disappearing at maturity; ascospore wall thin, initially with a thin halo; endospore thin.
CHEMISTRY: Thallus K+ yellowish to brown, C–, P+ orange; containing stictic acid (major), constictic acid (minor), cryptostictic acid (minor), hypostictic acid (trace), a-acetyl-hypoconstictic acid (trace).
  A rare endemic on bryophytes, peaty soil and plant debris over rocks in alpine heathland in Tas., at altitudes of 800–1080 m.  
  Mangold et al. (2009)  

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