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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 mastoidea (Ach.) Müll.Arg.
  Bot. Jahrb. Syst. 6: 399 (1885); Pyrenula mastoidea Ach., Gesell. Naturfor. Freunde Berliner Mag. 6: 16 (1814). T: Manila, [Philippines], coll. unknown; lecto: UPS, fide G.O.A.Malme, Ark. Bot. 23A(1): 14 (1929); isolecto: H-ACH, S.  
  Thallus epiphloeodal or epilithic, continuous to areolate, pale grey, pale khaki-grey or pale grey-green, matt to glossy, smooth to irregularly rugulose, (50–) 100 (–200) µm thick, K+ dull orange-brown or red-brown, corticate, usually with a brown-black basal layer; prothallus whitish, brown-black or not apparent. Algae Trentepohlia; cells 8–16 × 8–13 µm. Perithecial verrucae convex to hemispherical, 0.36–0.9 mm diam.; wall containing a layer of colourless crystals; apex plane to convex; ostiole inconspicuous or in a shallow depression or a papilla; periostiolar area usually black, 0.05–0.2 (–0.3) mm diam. Involucrellum apical to dimidiate, pale to medium brown below the apex, 20–40 µm thick. Exciple 20–25 µm thick, pale yellow-brown to orange-brown. Centrum 0.25–0.44 mm wide. Asci elongate-cylindrical, 115–162 × 16–25 µm. Ascospores fusiform to elongate-cylindrical, 7 (or 8)-septate, 32–66 × 6–13 µm; perispore 1.5–3.5 µm thick. Pycnidia semi-immersed to almost completely immersed, 80–140 µm diam., resembling miniature perithecial verrucae. Conidia fusiform to elongate-fusiform, 3–5 × 1 µm.
  Occurs in Christmas Is. and eastern Qld. A rather common and mainly corticolous forest species in the Neotropics and the eastern Palaeotropics.  
  McCarthy (2001b)  

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

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