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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
Porina mastoidella (Nyl.) Müll.Arg.
  Bot. Jahrb. Syst. 6: 401 (1885); Verrucaria mastoidella Nyl., Flora 50: 8 (1867). T: India, Calcutta, Botanical Garden, on bark of Cycas rumphii, S.Kurz 99a; holo: H-NYL. 1947!  
  Thallus epiphloeodal, to 5 cm wide, pale grey-green, smooth to rugulose and verruculose, partly matt, partly glossy (especially towards the margin), 30–60 µm thick, heavily impregnated with crystals, ±ecorticate; dark hypothallus lacking; prothallus silvery grey. Algae Trentepohlia; cells ellipsoidal. Perithecial verrucae shallowly to markedly convex, 0.25–0.35 (–0.39) mm diam.; periostiolar cap pale to medium orange-brown to reddish brown, 0.08–0.16 mm wide; ostiole concolorous or a little darker. Involucrellum apical and vestigial. Excipulum c. 10 µm thick, pale orange-brown. Centrum 0.1–0.16 mm diam. Asci narrowly cylindrical to narrowly obclavate; apex subtruncate. Ascospores narrowly oblong or narrowly fusiform, straight, curved or sigmoidal, 7-septate, 17–25 × 2.5–4 µm; perispore thin or not apparent. Pycnidia not seen.
  Grows on bark and on limestone in Christmas Is.; also in India and Vanuatu.  
  McCarthy (2001k)  

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

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