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Alan Silverside's Lichen Pages
Lichenicolous Fungi
Abrothallus welwitschii Mont. ex Tul.
Ascomycota, incertae sedis: apothecia black, emarginate (lecideoid), convex, surface somewhat rugose, arising directly on the host thallus, ascospores brown, 1-septate; anamorphic stage Vouauxiomyces, black pycnidia, set in the host surface. Parasitic on Sticta spp.
Refs: Hawksworth (1983), 20 (as A. parmeliarum, in part).
Black apothecia on Sticta limbata, Stackpole, Pembrokeshire, May 2009. Note that the whitish, powdery areas are the soredia of the host.
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© A.J. Silverside
Uploaded December 2009, last modified August 2010
