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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 diacapsis (Ach.) Lumbsch

Lichenologist 20: 20 (1988)

Urceolaria diacapsis Ach., Methodus 339 (1810); — Urceolaria scruposa var. diacapsis (Ach.) Schaer., Enum. Lich. Eur. 90 (1850); — Lecanora diacapsis (Ach.) Nyl., Mém. Soc. Sci. Nat. Cherbourg 2: 313 (1854).

T: Lagasca, Spain, coll. unknown; lecto: S, fide H.T.Lumbsch, loc. cit.

  Thallus superficial, to c. 3 mm thick, white to whitish grey, dull, rough, rimose-areolate to verrucose-areolate, whitish-pruinose. Epinecral layer to c. 50 µm thick. Algal layer continuous, well developed; calcium oxalate crystals sparse, scattered, small. Vegetative propagules not seen. Ascomata conspicuous, blackish, to c. 2.5 mm diam., ±rounded, urceolate, solitary, immersed. Disc visible from above, blackish brown, slightly whitish-pruinose, to c. 1.5 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 110–180 µm thick, not inspersed, moderately conglutinated; lateral paraphyses to c. 20 µm long. Epihymenium pale brown, granulose. Asci 4–8-spored. Ascospores broadly ellipsoidal, with subacute ends, hyaline to brown, non-amyloid, 20–38 × 9–17 µm, with 3–6 × 1–2 locules; locules ±rounded to angular; septa thick, regular; ascospore wall thin to thick; endospore thick. Pycnidia immersed; pores blackish brown. Conidia 4–6 × 1.0–1.5 µm.
CHEMISTRY: Thallus K–, C+ red, P–; containing lecanoric acid (major), diploschistesic acid (major), orsellinic acid (minor).
  Occurs on soil in S.A. and N.S.W.; widely distributed in semi-arid regions of the Northern Hemisphere.  
  Mangold et al. (2009)  

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

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