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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 actinostomus (Pers. ex Ach.) Zahlbr.

Hedwigia 31: 34 (1892)

Verrucaria actinostoma Pers. ex Ach., Lichenogr. Universalis 288 (1810); — Limboria actinostoma (Pers. ex Ach.) A.Massal., Ric. Auton. Lich. Crost. 155 (1852); — Lecanora actinostoma (Pers. ex Ach.) Nyl., Bot. Not. 1853: 155 (1853); — Acrorixis actinostoma (Pers. ex Ach.) Trevis., Consp. Verruc. 15 (1860); — Urceolaria scruposa var. actinostoma (Pers. ex Ach.) Grognot, Crypt. Cellul. 64 (1863); — Lagerheimina actinostoma (Pers. ex Ach.) Kuntze, Revis. Gen. Pl. 2: 478 (1891).

T: “Gallia” [France], C.H.Persoon 85; holo: H-ACH 687.

  Thallus epilithic, to c. 1.5 mm thick, whitish grey to grey, glossy, smooth, rimose-areolate. Epinecral layer to c. 40 µm thick. Algal layer continuous, well developed; calcium oxalate crystals sparse, scattered, small to large. Vegetative propagules not seen. Ascomata conspicuous, blackish, to c. 3 mm diam., ±rounded, perithecioid, solitary, immersed. Disc not visible from above. Pores small, to c. 0.1 mm diam., ±rounded; inner and apical proper exciple visible from above, free, black, epruinose to slightly greyish-pruinose. Thalline rim margin thin, ±rounded, whitish grey, glossy, concolorous with and having the same surface features as the thallus, immersed. Proper exciple free, thick, blackish brown, non-amyloid. Hymenium 120–160 µm thick, not inspersed, moderately conglutinated; lateral paraphyses to c. 20 µm long. Epihymenium hyaline to pale brown, egranulose. Asci 4–6 (–8)-spored. Ascospores broadly ellipsoidal, with ±rounded to subacute ends, brown, non-amyloid, 16–32 × 10–20 µm, with 4–6 × 1–3 locules; locules ±rounded to angular; septa thick, regular; ascospore wall thin to thick; endospore thick. Pycnidia immersed in the thallus; pores blackish brown. Conidia 4–7 × c. 1 µm.
CHEMISTRY: Thallus K–, C+ red, P–; containing lecanoric acid (major), diploschistesic acid (major), orsellinic acid (minor), ±gyrophoric acid (minor).
  Known from exposed, siliceous rocks in all States and the N.T.; subcosmopolitan.  
  Mangold et al. (2009)  

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

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