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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 decorticans (Müll.Arg.) Frisch & Kalb

Lichenologist 38: 44 (2006)

Thelotrema decorticans Müll.Arg., Bull. Herb. Boissier 1: 54 (1893).

T: Black Spur, Vic., 1888, F.R.M.Wilson “514”; holo: G; iso: NSW.

Topeliopsis corticola Kalb, Mycotaxon 79: 322 (2001). T: Mount Wilson, Blue Mtns, N.S.W., K. & A.Kalb 20462; holo: CANB.

  Thallus immersed to superficial, to c. 150 µm thick, olive-green, occasionally rather pale, dull to slightly glossy, smooth, continuous to rarely verruculose, non-rimose. True cortex to c. 30 µm thick, composed of strongly conglutinated periclinal to irregular hyphae; occasionally the thallus uncovered or with a discontinuous protocortex to c. 20 µm thick. Algal layer continuous, well developed; calcium oxalate crystals lacking or very sparse, small and clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 1 mm diam., ±rounded, perithecioid when young, becoming apothecioid, sessile, solitary to marginally slightly fused, emergent, subglobose when young, becoming urceolate to rarely depressed-urceolate. Disc usually not visible from above, sometimes becoming partly visible, pale flesh-coloured, epruinose. Pores small to moderately broad, rarely gaping, to c. 0.5 mm diam., irregular to stellate, with a split pore margin in immature ascomata, in older ascomata often ±rounded with an entire pore margin; proper exciple not visible from above. Thalline rim apically pruinose, off-white, incurved; rim margin coarsely cracked to slightly lacerate, in older ascomata often becoming ±entire and smooth. Proper exciple fused, thick, hyaline internally, pale yellowish to greyish marginally; internal part of exciple and subhymenial layer usually slightly to distinctly amyloid. Hymenium to c. 200 µm thick, conglutinated; paraphyses distinctly parallel, with unthickened tips; lateral paraphyses conspicuous, to c. 35 µm long. Epihymenium hyaline, without granules and crystals. Asci 8-spored; tholus thick in immature asci, thin or not apparent at maturity. Ascospores muriform, rounded-fusiform to reniform, rarely cylindrical, with rounded to narrowly rounded ends, hyaline, amyloid, 30–70 × 10–25 µm, with 8–16 × 1–6 locules; locules large, ±rounded to somewhat angular, subglobose to ±rounded-cuboid or slightly oblong; transverse septa thin to thick, distinct, regular to slightly irregular; ascospore wall thick, occasionally with a crenate surface, often with a thin halo; endospore thin to thick.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Endemic to eastern N.S.W., Vic. and Tas.; grows on epiphytic mosses, rarely on wood, bark and siliceous rock in warm- to cool-temperate rainforest and wet-sclerophyll forest, at altitudes to 1500 m.  
  Mangold et al. (2009)  

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

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