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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 tolgensis P.M.McCarthy
  Fl. Australia 58A: 228 (2001). T: Tolga, 5 km N of Atherton, Qld, 17°13'S, 145°29'E, 3 Sept. 1999, H.Streimann 64873 (part) & T.Pócs; holo: CANB.  
  Thallus epiphyllous, diffuse to determinate, very thin and inconspicuous, continuous, to 20 µm thick, grey-green, smooth, matt; prothallus not apparent. Algae Phycopeltis; cells elongate-rectangular or more irregular, 8–14 × 3–5 µm, ±forming radiating plates. Perithecial verrucae applanate to very shallowly convex, 0.6–1.3 mm diam., pale yellowish brown, not containing crystals; surface smooth to faintly and irregularly rugose; apex rounded, slightly pointed or (more commonly) shallowly concave; ostiole usually inconspicuous; periostiolar area dark grey, 0.1–0.3 mm diam. Involucrellum extending to exciple base level, dark violet-grey in thin section, 30–50 µm thick at the base, subtended by a loose reticulum of blackish 3–4 µm thick hyphae. Exciple 15–20 µm thick, mainly hyaline, with or without a violet-greyish outer zone. Centrum strongly depressed, 0.25–0.35 mm wide. Asci narrowly obclavate to cylindrical, growing from the lower corners of the centrum (thin median section), not from the base, 95–130 × 19–29 µm. Ascospores elongate-fusiform to oblong, straight or curved, 7-septate, 54–68 × 7–12 µm; perispore to 6 (–10) µm thick on immature ascospores, c. 2–4 µm thick at maturity. Pycnidia not seen.
  Known from two localities in north-eastern Qld where it grows on leaves of trees in montane scrub and rainforest; also in the Solomon Islands.  
  McCarthy (2001b)  

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

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