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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 nucula Ach.
  Syn. Meth. Lich. 112 (1814). T: Guinea; lecto: H-ACH 731A, fide R.C.Harris, More Florida Lich. 174 (1995); isolecto: S.  
  Thallus epiphloeodal or (rarely) epilithic, continuous to richly rimose, pale grey-brown, pale yellow-brown or pale greyish green, matt to slightly glossy, smooth to verruculose, (20–) 40–60 (–100) µm thick, corticate, occasionally with simple or branched isidioid outgrowths; prothallus not apparent. Algae Trentepohlia; cells 7–14 × 7–12 µm. Perithecial verrucae hemispherical to subglobose, 0.36–0.76 mm diam.; wall containing a layer of colourless crystals; apex concolorous with the thallus to medium brown; ostiole inconspicuous or in a shallow depression. Involucrellum apical to dimidiate or extending to exciple base level, yellow-brown to orange-brown. Centrum 0.25–0.45 mm wide. Exciple 15–25 µm thick, pale yellow-brown. Asci elongate-cylindrical, 140–200 × 20–30 µm. Ascospores fusiform to broadly fusiform, (6–) 7 (–9)-septate, 35–65 (–83) × 10–18 µm; perispore usually present, 1.5–4 µm thick. Pycnidia not seen.
  Occurs in Christmas Is., eastern Qld and eastern N.S.W.; usually grows on the bark of rainforest trees, rarely saxicolous. A pantropical species.  
  McCarthy (2001b)  

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

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