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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
Strigula albicascens (Nyl.) R.C.Harris
  More Florida Lichens: 154 (1995); Verrucaria albicascens Nyl., Fl. Nov. Zel.: 129 (1888); Porina albicascens (Nyl.) Müll. Arg., Bull. Soc. Bot. Belgique 31, 38 (1892). Type: New Zealand, 1867, C.Knight; lectotype: H-NYL. 1354A (!), fide R.C.Harris, loc. cit.; syntype: H-NYL. 1983 (!).  
  Thallus endophloeodal to thinly epiphloeodal, continuous, pale greyish green. Photobiont Trentepohlia. Prothallus not apparent. Perithecia numerous, black, semi-immersed to 2/3-immersed, (0.23–) 0.28 (–0.33) mm diam., orbicular to ellipsoidal in outline, leaving shallow pits surrounded by blackish rings (involucrellum bases) following decay. Involucrellum blackish, 35–65 µm thick, arching away from the excipulum and extending almost to excipulum base level. Excipulum hyaline to medium brown, 12–15 µm thick. Centrum 0.15–0.26 mm diam. Hamathecium of simple to sparingly branched paraphyses, to 1 µm thick. Asci elongate-ellipsoidal to cylindrical, 8-spored, 65–70 × 12–14 µm; apical wall with a minute ocular chamber. Ascospores colourless, elongate-fusiform or more rounded at the proximal end, irregularly biseriate, (3–) 5 (–6)-septate, slightly constricted at the septa, (16–) 25 (–32) × (4.5–) 6 (–7.5) µm. Microconidia bacilliform, 3–4 × 0.5 µm; macroconidia not seen.
  A very inconspicuous lichen known from several widely scattered forest localities in the high rainfall areas (>1000 mm per annum) of southern Tas.; also in New Zealand.  
  McCarthy & Kantvilas (1999a)  

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

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