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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 muralis Ach.
     
  Methodus 115 (1803). T: Europe; n.v.  
     
  Thallus endolithic to subepilithic, continuous to rimose, pale grey, grey-green or grey-brown. Algae globose, 7–11 µm diam. Prothallus usually not apparent. Perithecia usually semi-immersed in the substratum, 0.25–0.5 (–0.6) mm diam., black; apex usually rounded; ostiole inconspicuous to excavate. Involucrellum dimidiate or extending to exciple base level, 40–80 µm thick. Exciple 20–25 µm thick, hyaline to pale brown. Centrum 0.2–0.4 mm wide. Periphyses 25–35 × 1–2 µm long. Asci 60–80 × 20–25 µm. Ascospores narrowly to broadly ellipsoidal, 19–28 × 9–15 µm.
     
  Occurs in south-eastern N.S.W., Vic. and Tas., usually on rather soft or weathered limestone. A common species in northern Eurasia and North America; also in China (Hong Kong) and New Zealand.  
     
   
     
     
  McCarthy (2001h)  

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