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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 laceratula (Müll.Arg.) Mangold

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

Thelotrema laceratulum Müll.Arg., Flora 70: 399 (1887).

T: Trinity Bay, [Cairns], Qld, W.A.Sayer s.n.; lecto: G, fide A.Mangold, J.A.Elix & H.T.Lumbsch, Fl. Australia 57: 659 (2009).

  Thallus endophloeodal to epiphloeodal, to c. 200 µm thick, pale to dark olive-green to olive-brown, smooth, continuous to rugose, ±rimose. True cortex to 50 µm thick, yellowish, continuous, of predominantly irregular hyphae, sometimes with substratum inclusions.  Algal layer well developed, continuous; calcium oxalate crystals abundant, small to large, often clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 0.6 (–0.8) mm diam., ±rounded to somewhat irregular, perithecioid, rarely apothecioid, erumpent, solitary to occasionally fused, immersed to slightly emergent, then hemispherical. Disc not visible from above. Pores minute to small, to c. 0.2 mm diam., ±rounded to irregular, entire or more often split; proper exciple not visible from above. Thalline rim margin thick, ±rounded to irregular, lacerate to coarsely squamose and layered, off-white to brownish due to the protuberant substratum, incurved; outer thalline rim concolorous with the thallus, often erect to slightly recurved. Proper exciple fused, thin to thick, hyaline to pale yellowish internally, brownish to greyish marginally, non-amyloid. Hymenium to c. 200 µm thick, weakly conglutinated; paraphyses parallel, with unthickened to slightly thickened tips; lateral paraphyses inconspicuous, to c. 15 (–25) µm long. Epihymenium hyaline, without granules and crystals. Asci 1 (–2)-spored; tholus initially thick, thin when mature. Ascospores muriform, fusiform to bifusiform, with narrowly rounded to, rarely, subacute ends, hyaline, 70–160 (–170) × 20–35 µm, with 20–30 × 1–8 locules; locules usually large, ±rounded to slightly angular, subglobular to irregular, strongly to opaque-amyloid; transverse septa thin, distinct, regular; ascospore wall and endospore non-amyloid; ascospore wall thick, with a thin and occasionally irregular halo; endospore thin to thick.
CHEMISTRY: Thallus K–, C–, P–; no secondary compounds detectable by TLC.
  Common on bark in rainforest in north-eastern Qld, at altitudes of 60–1000 m; endemic.  
  Mangold et al. (2009)  

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

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