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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
Topeliopsis elixii Frisch & Kalb

Lichenologist 38: 40 (2006)

T: Darlington Range, Qld, K. & A.Kalb 33979/2; holo: CANB.

  Thallus superficial, to 100 µm thick, pale yellowish grey, slightly glossy, smooth, continuous to faintly verruculose, non-rimose. True cortex to c. 25 µm thick, continuous or not, composed of periclinal hyphae. Algal layer continuous and well developed; calcium oxalate crystals not seen. Vegetative propagules not seen. Ascomata inconspicuous, to c. 0.8 mm diam., ±rounded, apothecioid, erumpent, solitary, emergent, mostly urceolate, rarely depressed-urceolate. Disc partly visible from above, pale flesh-coloured to reddish brown, slightly pruinose. Pores becoming broad, rarely somewhat gaping, to c. 0.5 mm diam., irregular in immature ascomata, becoming ±rounded, at first opening as irregular cracks, older ascomata with a coarsely split to eroded pore margin; proper exciple not visible from above. Thalline rim coarsely cracked to somewhat lobed, lacerate to eroded, often becoming slightly pruinose, concolorous with the thallus or a little brighter. Proper exciple fused, becoming somewhat free when the thalline rim is strongly eroded, thick, not clearly separated from the thalline margin, hyaline internally, greyish brown marginally, ±amyloid towards the base and subhymenium. Hymenium to c. 200 µm thick, moderately conglutinated; paraphyses parallel to slightly interwoven, with unthickened to slightly thickened tips; lateral paraphyses inconspicuous, to c. 20 µm long. Epihymenium hyaline, with greyish brown granules. Asci 1-spored; tholus initially thin to thick, not visible at maturity. Ascospores muriform, oblong to ellipsoidal, with ±rounded to narrowly rounded ends, hyaline, strongly amyloid, 110–180 × 20–55 µm, with numerous locules; locules ±rounded to slightly angular, mostly irregular; ascospore wall thin, younger stages with a thin halo; endospore thin; transverse septa only distinct when immature, thin and ±regular, becoming irregular, then vanishing, finally developing ascoconidia. Ascoconidia developing in old ascospores, bacilliform, to c. 7 × 1 µm.
CHEMISTRY: Thallus K+ yellow, C–, P+ orange; containing hypoconstictic acid (major), hyposalazinic acid (major), hypostictic acid (minor), a-acetylconstictic acid (trace).
  Occurs on epiphytic mosses and adjacent tree bark in a subtropical rainforest at an altitude of 980 m in south-eastern Qld; endemic.  
  Mangold et al. (2009)  

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

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