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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 nigrofusca Müll.Arg.
  Flora 66: 322 (1883). T: near Apiahy [Apiaí, Rio de Janeiro], Brazil, Oct. 1881, J.I.Puiggari s.n.; holo: G.  
  Thallus epilithic, rimose to areolate, pale sandy brown or pale to medium grey-green, matt, smooth, 0.15–0.4 (–0.75) mm thick, ±corticate; prothallus dark brown or not apparent. Algae Trentepohlia; cells 6–16 × 6–12 µm. Perithecia semi-immersed to almost completely immersed, hemispherical or inconspicuous, 0.2–0.44 mm diam., dark brown to black; apex ±plane or rounded; ostiole inconspicuous or in a papilla or shallow depression. Involucrellum dimidiate, internally pale to medium orange-brown or grey-brown, spreading laterally or contiguous with the exciple, 50–80 µm thick, not containing algae, K–. Exciple 20–30 µm thick, hyaline to dark brown. Centrum 0.16–0.3 mm wide. Asci elongate-fusiform, c. 118 × 11 µm. Ascospores elongate-cylindrical to fusiform, 3-septate, 18–27 × 3–5.5 µm; perispore not apparent. Pycnidia semi-immersed to ±immersed, 50–150 µm diam., brown-black. Conidia elongate-fusiform to bacilliform, 3–5 (–7) × 0.7–1 µm.
  Occurs in north-eastern Qld; grows on siliceous rocks in rainforest. Also on damp and aquatic rocks in southern Brazil.  
  McCarthy (2001b)  

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

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