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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 maura Wahlenb.
  in E.Acharius, Methodus 19 (1803). T: Europe; holo: H-ACH n.v.  
  Thallus epilithic, richly rimose to areolate, dark grey-green to greenish black, frequently with black, 10–40 µm wide puncticulae, (0.05–) 0.1–0.3 (–0.7) mm thick; areolae angular, plane to slightly convex, 0.1–0.5 (–0.8) mm wide. Prothallus black or not apparent; basal layer dark brown to black. Algae ellipsoidal to globose, c. 3–8 × 3–6 µm. Perithecia semi-immersed to almost superficial, often partly or largely overgrown by a 30–50 µm thick thalline layer, 0.25–0.5 mm diam., black; apex plane to rounded; ostiole inconspicuous to slightly depressed. Involucrellum dimidiate or extending to exciple base level and merging with the basal layer, contiguous with or arching away from the exciple, 40–70 (–120) µm thick. Exciple 10–20 µm thick, hyaline to brown-black. Centrum 0.2–0.3 mm wide. Periphyses 25–35 × 1–2 µm. Asci 38–46 × 17–20 µm. Ascospores usually narrowly ellipsoidal, 12–20 (–22) × 6–8 (–9) µm.
  Occurs on seashore rocks in 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. Ubiquitous on most temperate to boreal coasts of Eurasia, North America, Japan and Antarctica; also in Macquarie I. and New Zealand.  
  McCarthy (2001h)  

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

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