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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 gypsaceus (Ach.) Zahlbr.

Hedwigia 31: 35 (1892)

Urceolaria gypsacea Ach., Lichenogr. Universalis 339 (1810); — Lecanora scruposa var. gypsacea (Ach.) Sommerf., Suppl. Fl. Lapp. 100 (1826); — Urceolaria scruposa var. gypsacea (Ach.) Körb., Syst. Lich. Germ. 168 (1855); — Urceolaria albissima var. gypsacea (Ach.) Arnold, Flora 67: 417 (1884).

T: Switzerland, J.Schleicher; lecto: GOET, fide H.T.Lumbsch, Lichenologist 20: 22 (1988).

  Thallus epilithic, to c. 0.3 mm thick, greenish white to whitish grey, dull, rough, rimose-areolate, heavily whitish-pruinose. Epinecral layer to c. 30 µm thick. Algal layer continuous, well developed; calcium oxalate crystals sparse, scattered, small to large. Vegetative propagules not seen. Ascomata conspicuous, blackish, to c. 5 mm diam., ±rounded, urceolate, solitary, immersed. Disc visible from above, blackish brown, epruinose to greyish-pruinose; inner and apical proper exciple visible from above, free, black, epruinose to slightly greyish-pruinose. Thalline rim margin thin, ±rounded, concolorous with and having the same surface features as the thallus, immersed. Proper exciple free, thick, blackish brown, non-amyloid. Hymenium 120–190 µm thick, not inspersed, moderately conglutinated; lateral paraphyses conspicuous, to c. 20 µm long. Epihymenium hyaline to pale brown, granulose. Asci 4-spored. Ascospores broadly ellipsoidal, with acute to subacute ends, brown, non-amyloid, 25–40 × 10–17 µm, with 4–7 × 1–2 locules; locules ±rounded to angular; septa thick, regular; ascospore wall thin to thick; endospore thick. Pycnidia not seen.
CHEMISTRY: Thallus K–, C+ red, P–; containing lecanoric acid (major), orsellinic acid (minor).
  Grows on moderately shaded, calcareous rocks in S.A. and southern N.S.W.; subcosmopolitan.  
  Mangold et al. (2009)  

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

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