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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 austropacifica P.M.McCarthy
  Australas. Lichenol. 46: 21 (2000). T: Norfolk Island, Mt Pitt Reserve, track leading west from Mt Bates, 29°0.5'S, 167°56.5'E, 280 m, on lemon stem in poor forest on ridge, H.Streimann 34261, 6.xii.1984; holo: CANB.  
  Thallus epiphloeodal, determinate, pale olive-brown, 30–70 µm thick, closely adpressed to the substratum, continuous to sparingly rimose, matt to slightly glossy, heavily impregnated with crystals that form a discontinuous layer below the algae or become aggregated and become the core of verruculae. Surface densely verruculose, K-, becoming more intensely green when wetted; verruculae applanate to shallowly convex, round to irregular, 60–120 µm wide. Cortex not apparent or an 8–12 µm thick, alga-free, ±parenchymatous layer. Algae Trentepohlia; cells subglobose to globose, 6–10 × 6–9 µm. Hyphae 2–3 µm wide. Prothallus not apparent. Basal layer absent. Perithecia very numerous, immersed in thalline verrucae. Apex slightly concave, plane or slightly convex, with a concolorous apex or a pale orange-brown periostiolar area to 0.2 mm diam. Verrucae strongly convex to hemispherical, (0.45–) 0.62 (–0.82) mm diam.; wall to 0.2 mm thick at the base; surface smooth to slightly uneven. Involucrellum vestigial, dimidiate or extending to excipulum base level, orange-brown (thin section), K+ reddish. Excipulum pale to medium orange-brown near the ostiole, pale yellowish brown at the base, c. 12–15 µm thick. Subhymenium 25–35 µm deep. Centrum depressed-ovate, 0.25–0.35 mm diam. Paraphyses unbranched, 0.7–1 µm thick. Periphyses absent. Asci elongate-cylindrical to elongate-obclavate, 8-spored, 120–138 × 15–18 µm, with a rounded to subtruncate apex; apical ring not apparent. Ascospores colourless, (9–) 11 (–13)-septate, elongate-fusiform, tapering gradually to the proximal end, straight, curved or faintly sigmoidal, irregularly biseriate in the asci, (48–) 58.5 (–70) × (7–) 8.5 (–10) µm; contents clear; immature spores with a 1–2 µm thick gelatinous sheath.
  Known from two localities in Norfolk Is.; corticolous.  
  McCarthy (2000a)  

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

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