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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
Verrucaria microsporoides Nyl.
  Bull. Soc. Bot. France 8: 759 (1861). T: NW France; holo: H–NYL.  
  Thallus epilithic, continuous to sparingly or richly rimose, greenish black to black, matt, smooth, 20–50 (–100) µm thick, becoming gelatinous when wetted; margin sometimes noticeably thickened. Algae broadly ellipsoidal to globose, 4–8 (–10) µm. Prothallus not apparent; basal layer absent. Perithecia semi-immersed to almost superficial, hemispherical, 0.15–0.4 mm diam., black; apex rounded; ostiole usually papillate, or inconspicuous, or in a shallow 20–50 µm diam. depression. Involucrellum dimidiate or extending to exciple base level, contiguous with or arching away from the exciple, 28–45 µm thick. Exciple 10–20 µm thick, hyaline to pale brown at the base, to dark brown near the ostiole. Centrum 0.09–0.22 mm wide. Periphyses 10–20 × 1.5–2 µm. Asci 35–65 × 10–18 µm. Ascospores elongate-ellipsoidal, 10–16 (–18) × 3.5–6 (–8) µm.
  Occurs on rocky seashores in southern Vic. and Tas.; reports from W.A. and N.S.W. (R.B.Filson, Checklist Austral. Lichens & Allied Fungi 147, 1996) could not be confirmed. Also in north-western Europe and New Zealand.  
  McCarthy (2001h)  

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

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