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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 acutispora Kalb

Mycotaxon 79: 320 (2001)

T: Cunninghams Gap Natl Park, Qld, K. & A.Kalb 21901; holo: CANB; iso: Herb. Kalb.

  Thallus immersed to superficial, to 80 µm thick, pale grey to greyish green, appearing darker when growing on darker substrata, dull to glossy, smooth, continuous to verruculose, non-rimose. Protocortex discontinuous, to c. 30 µm thick, occasionally becoming conglutinated and forming a true cortex of irregular hyphae. Algal layer usually discontinuous and poorly developed; calcium oxalate crystals abundant and variable in size, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 1 mm diam., ±rounded, perithecioid to apothecioid, sessile, mostly solitary; in corticolous specimens moderately emergent and hemispherical, otherwise distinctly emergent and subglobose to urceolate. Disc usually not visible from above, rarely becoming partly visible, pale flesh-coloured, epruinose. Pores small to broad, rarely gaping, to c. 0.3 mm diam., usually ragged and ±irregularly stellate, with a distinctly split incurved pore margin; proper exciple not visible from above, in strongly eroded ascomata the proper exciple margin becoming visible, then the pore ±rounded to somewhat irregular, with a ±entire incurved pale brownish to reddish brown margin. Thalline rim lacerate, coarsely pruinose to squamulose, often eroded, somewhat exfoliating with age and becoming slightly layered, conspicuously off-white; rim margin thin to thick, concolorous with and having the same surface features as the remainder of thalline rim. Proper exciple fused, rarely apically free, thick, hyaline to pale yellowish internally, pale orange to reddish brown marginally, distinctly amyloid towards the base and subhymenium. Hymenium to c. 200 µm thick, conglutinated; paraphyses parallel to slightly interwoven, with unthickened to slightly thickened tips; lateral paraphyses conspicuous, to c. 30 µm long. Epihymenium hyaline, lacking granules. Asci 8-spored; tholus initially thick, thin when mature. Ascospores transversely septate, rarely with a single longitudinal septum, bacilliform-fusiform, ±distinctly bent, with narrowly rounded to subacute or acute ends, hyaline, strongly amyloid, 50–130 (–150) × 10–15 µm, with 19–32 locules; locules initially angular, becoming ±rounded, subglobose to slightly lentiform or oblong, with hemispherical to conical end cells; septa thin, regular; ascospore wall thick, distinctly halonate when immature.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Endemic and rather common in eastern Australia (Qld, N.S.W., Vic. and Tas.); grows on epiphytic mosses, rarely on tree bark or dead wood in warm-temperate, upland rainforest, cool-temperate rainforest or wet-sclerophyll forest, at altitudes of 50–1300 m.  
  Mangold et al. (2009)  

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

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