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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
Strigula australiensis P.M.McCarthy
  Muelleria 8: 323 (1995). T: 13 km SE of Innisfail, 3 km NE of Mena, Utchee Creek, by Utchee Falls, Qld, 17°38'24"S, 145°56'19'E, on shaded semi-aquatic basalt, 12 Sep. 1993, P. M. McCarthy 936; holo: MEL 1057469.  
  Thallus crustose, epilithic, effuse to determinate, continuous to sparingly rimose, pale greenish-grey to pale grey-brown, smooth to minutely and irregularly uneven, matt, ecorticate, (30-) 60 (-100) µm thick. Algae Trentepohlia; cells broadly ellipsoid to globose, 7-14 x 6-12 µm. Hyphae 2-3 µm wide. Prothallus not apparent. Perithecia semi-immersed to 2/3 immersed, usually solitary, occasionally paired, moderately to very numerous. Perithecial apex plane or convex. Ostiole inconspicuous or in a shallow, 60-100 µm wide depression. Involucrellum greyish-black in surface view, brown-black to black in thin section, dimidiate or extending to excipulum-base level, (0.32-) 0.44 (-0.58) mm diam., 30-60 µm thick towards the apex, 60-90 µm thick at the base, K-. Centrum broadly ovate to depressed-ovate, 0.2-0.32 mm diam. Excipulum uniformly hyaline to very pale brown, 15-20 (-25) µm thick. Paraphyses simple to sparingly branched (especially near their apices), not anastomosing, septate, long-celled, 1-1.5 µm thick; cells frequently guttulate. Periphyses absent. Asci fissitunicate, 8-spored, broadly to elongate-cylindrical, 68-93 x 17-22 µm; lateral walls c. 1 µm thick; apex rounded, 3-6 µm thick, with an ocular chamber 1-3 µm broad and 1-2 µm tall, convex to tuberculate; walls and apex IKI-; ascoplasma IKI+red-brown. Ascospores hyaline, elongate-ellipsoid to elongate-fusiform, submuriform, with 7-9 (-11) transverse septa, each loculus with (0-) 1 (-2) longitudinal or diagonal septa, often with a 2-3 µm thick gelatinous sheath when immature, irregularly biseriate in the asci, (23-) 29 (-36) x (7-) 9.5 (-11.5) µm. Conidiomata of two types: 1) 60-100 µm diam., black above, colourless below, with a simple conidiogenous layer and fusiform microconidia of 2-3 x c. 0.8 µm; 2) 0.19-0.24 mm diam., black above, colourless below, with narrowly cylindrical or narrowly ellipsoid, submuriform macroconidia of (19-) 23.5 (-30) x (6-) 7.5 (-9) µm, mostly with convex to acuminate, gelatinous appendages at their apices, growing obliquely from the tips of short, unbranched, c. 3 µm wide conidiophores.
  Occurs in south-eastern Qld and on and below the Atherton Tableland, north-eastern Qld; grows on shaded basalt and granite; also in Lord Howe Is. and New Zealand.  
  McCarthy (1995b)  

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

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