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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
Diploschistes thunbergianus (Ach.) Lumbsch & Vězda

in H.T.Lumbsch, Nova Hedwigia 56: 234 (1993)

Gyalecta thunbergiana Ach., Lichenogr. Universalis 152 (1810), nom. nov. pro Lichen excavatus Thunb. ex Ach., Methodus 148 (1803), non Haller, in Relhan, Fl. Cantab. 426 (1785).

T: “Cap B. Spei” [Cape of Good Hope, South Africa]; holo: UPS-THUNB 21111.

Diploschistes scruposus var. australica Räsänen, Arch. Soc. Zool. Bot. Fenn. “Vanamo” 3: 184 (1948). T: “ad terram arenosam”, Vic., 1888, F.R.M.Wilson; holo: G.

  Thallus superficial, to c. 2 mm thick, whitish grey to pale grey, dull, rough, rimose-areolate to verrucose-areolate, whitish-pruinose; areolae plane. Epinecral layer to c. 40 µm thick. Algal layer continuous, well developed; calcium oxalate crystals sparse, scattered, small. Vegetative propagules not seen. Ascomata conspicuous, blackish, to c. 1.5 mm diam., ±rounded, urceolate, solitary, immersed. Disc visible from above, blackish brown, slightly whitish-pruinose, to c. 1.2 mm diam., ±rounded; inner and apical proper exciple visible from above, free, black, epruinose to slightly greyish-pruinose. Thalline rim margin thick, ±rounded, concolorous with and having the same surface features as the thallus, emergent. Proper exciple free, thick, blackish brown, non-amyloid. Hymenium 100–160 µm thick, not inspersed, moderately conglutinated; lateral paraphyses conspicuous, to c. 20 µm long. Epihymenium pale brown, granulose. Asci 4–8-spored. Ascospores broadly ellipsoidal, with subacute ends, hyaline to brown, non-amyloid, 16–28 × 6–16 µm, with 3–5 × 1–2 locules; locules ±rounded to angular; septa thick, regular; ascospore wall thin; endospore thick. Pycnidia immersed in the thallus; pores blackish brown. Conidia 4–6 × 1.0–1.5 µm.
CHEMISTRY: Thallus K+ yellowish to red, C+ red, P–; containing lecanoric acid (major), diploschistesic acid (major), orsellinic acid (minor).
  Widely distributed and locally abundant on soil in most semi-arid regions of Australia (W.A., N.T., S.A., N.S.W., A.C.T., Vic. and Tas.); also in southern Africa and New Zealand.  
  Mangold et al. (2009)  

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

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