P. W.  James and Hawksworth, D. L., ?Thelotrema?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 891-893.

A.  Fletcher and Hawksworth, D. L., ?Diploschistes?, in Lichens of Great Britain and Ireland, London: British Lichen Society, 2009, pp. 378-380.