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Images of British Lichenicolous Fungi

Vouauxiella lichenicola (Linds.) Petr. & Syd.

Ascomycota, incertae sedis: pycnidia immersed in apothecia of Lecanora species, notably L. chlarotera, conidia grey-brown, smooth-walled (described as finely verrucose by Sutton (1980)), produced in chains. Widespread and locally frequent.

Refs: Hawksworth (1976), 58 (line illustration); Hawksworth (1981), 65; Hawksworth (1983), 28; Sutton (1980), 24, 25 (line illustration); Diederich in Nash et al. (2004) 714.

Vouauxiella verrucosa is a rarer species on the same hosts, differing in its coarsely verrucose conidia. Microscopic examination is required for identification of these species.

Vouauxiella lichenicola on Lecanora chlarotera
Vouauxiella lichenicola on Lecanora chlarotera, closer view
On Lecanora chlarotera, on Ash, Daimh-sgeir, Jura, May 2011 (BLS meeting)
Vouauxiella lichenicola on Lecanora chlarotera, pycnidium and spores
Vouauxiella lichenicola on Lecanora chlarotera, pycnidium
Cross section of upper part of pycnidium and spores (in water, examined with Nomarski DIC, which has taken out some of the brown colour of the spores), in apothecium of Lecanora chlarotera, on Ash (Fraxinus excelsior) twig, Daimh-sgeir, Jura, May 2011 (BLS meeting). Note that the ostiole is oriented to the left in the photograph.

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© A.J. Silverside
Uploaded May 2011, last updated March 2013