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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 subdenticulata (Zahlbr.) Frisch & Kalb

Lichenologist 38: 44 (2006)

Ocellularia subdenticulata Zahlbr., in C.Skottsberg, Nat. Hist. Juan Fernandez & Easter Island 2, Bot.: 329 (1924); — Thelotrema subdenticulatum (Zahlbr.) G.Salisb., Lichenologist 5: 267 (1972).

T: Masafuera, Juan Fernandez Islands, C. & I.Skottsberg s.n.; holo: W.

Topeliopsis vezdae Kalb, Mycotaxon 79: 323 (2001). T: Styx River State Forest, Qld, K.Kalb & J.Williams 19199; holo: CANB.

  Thallus superficial, to 60 (–100) µm thick, pale grey to greyish green, appearing darker on dark 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 discontinuous, in corticolous specimens continuous and well developed; calcium oxalate crystals usually abundant, of variable size, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 1.2 mm diam., ±rounded, perithecioid or apothecioid, sessile, mostly solitary, emergent and subglobose to urceolate. Disc usually not visible from above, rarely becoming partly visible, pale flesh-coloured, epruinose. Pores small to moderately broad, rarely gaping, to c. 0.4 (–0.6) mm diam., usually ragged and irregular to stellate; pore margin distinctly split, incurved; proper exciple not visible from above, in strongly eroded ascomata the apex of the proper exciple becoming visible, ±rounded to somewhat irregular, ±entire, incurved, pale brownish to reddish brown. Thalline rim margin thin to thick, concolorous with and having the same structure as the rest of thalline rim; thalline rim lacerate, coarsely pruinose to squamulose, often eroded, exfoliating a little with age and becoming slightly layered, conspicuously off-white. Proper exciple usually fused, in eroded ascomata occasionally apically exposed, thick, hyaline to pale yellowish internally, pale orange to reddish brown marginally, usually distinctly amyloid towards the base and subhymenium. Hymenium to c. 150 µm thick, conglutinated; paraphyses parallel to slightly interwoven, with unthickened to slightly thickened tips; lateral paraphyses conspicuous, to c. 40 µm long. Epihymenium hyaline, without granules and crystals. Asci 8-spored; tholus initially thick, thin when mature. Ascospores transversely septate, bacilliform-fusiform to fusiform, ±bent, with narrowly rounded to subacute ends, hyaline, strongly amyloid, 50–100 (–110) × 10–17 µm, with 15–24 (–25) locules; locules initially angular, becoming ±rounded, subglobose to lentiform, with hemispherical to conical end cells; septa thin, regular; ascospore wall thick, often slightly crenate, distinctly halonate when immature.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  A common, mainly temperate species on epiphytic mosses, rarely on tree bark or dead wood in south-eastern Qld, N.S.W., Vic. and Tas.; grows in cool-temperate and warm-temperate rainforest and wet-sclerophyll forest at altitudes of 20–1150 m. Also in southern New Zealand and Islas Juan Fernández in the south-eastern Pacific Ocean.  
  Mangold et al. (2009)  

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

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