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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 riparia P.M.McCarthy
  Biblioth. Lichenol. 52: 95 (1993). T: Ellenborough R., above Ellenborough Falls, 2.5 km M of Elands, 29 km NNW of Wingham, New England Tableland, N.S.W., 10 Feb. 1991, P.M.McCarthy 546; holo: MEL; iso: HO, NSW.  
  Thallus epilithic, rimose to areolate, medium grey-green to olive-green, matt, smooth, 50–150 (–200) µm thick, ecorticate; prothallus not apparent. Algae Trentepohlia; cells 8–16 × 8–12 µm. Perithecia two-thirds immersed to superficial, hemispherical to subglobose, sometimes partly overgrown by the thallus, 0.26–0.4 mm diam., dull black; apex rounded; ostiole inconspicuous or in a 20–40 µm wide depression. Involucrellum dimidiate to subentire, greenish black in thin section, contiguous with the exciple, 20–35 µm thick, not containing algae, K–. Exciple 20–30 µm thick, hyaline to pale yellow-brown at the base and sides, darker near the apex. Centrum 0.22–0.28 mm wide. Asci narrowly cylindrical, 90–118 × 12–15 µm. Ascospores elongate-fusiform to elongate cylindrical, 7 (–9)-septate, 40–66 × 4–5.5 µm; perispore usually not apparent. Pycnidia immersed, 80–120 µm diam., brown-black above, hyaline below. Conidia short- to elongate-bacilliform, 4–7 (–10) × 1.5–2.2 µm.
  Endemic to eastern N.S.W.; known only from the type locality where it inhabits hard siliceous rock on the bank of a river at and just above summer water level.  
  McCarthy (2001b)  

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

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