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Images of British Lichens

Clauzadeana macula (Taylor) Coppins & Rambold

Crust a dominant, black prothallus, supporting minute (<1mm diam.) pale brown to shining reddish-brown areoles but seeming uniformly black except on close examination; apothecia with thin, thalline margins and black discs, sunk in the areoles (compare Schaereria fuscocinerea). Very local on hard, exposed, generally base-poor upland rocks.

Refs: Smith et al. (2009), 341; Purvis et al. (1992), 213; Wirth (1995), 1: 345; Thomson (1997), 293 (as Lecanora morioides).

Clauzadeana macula, growing over Rhizocarpon geographicum
On montane rockface, growing over Rhizocarpon geographicum, Braemar, Aberdeenshire, April 2002
Clauzadeana macula, close view
Clauzadeana macula, close view
On montane rockface, Braemar, Aberdeenshire, March 2008

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© A.J. Silverside
Uploaded March 2008, last modified November 2011 (first hosted at, January 2003)