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Images of British Lichenicolous Fungi

Marchandiomyces aurantiacus (Lasch) Diederich & Etayo

Basidiomycota, Ceratobasidiales: orange sclerotia on dead and dying areas of the host thallus; sexual stage not (yet?) recorded in Britain. Described (Diederich et al., see below) as "a virulent parasite of corticolous Physcia spp., occasionally also attacking neighbouring thalli of other lichens", probably widespread in Britain but little recorded.

Refs: Diederich, Schultheis & Blackwell (2003), Mycological Research 107: 523–527 (monochrome photos).

Marchandiomyces aurantiacus on Physcia tenella
Marchandiomyces aurantiacus on Physcia tenella
On Physcia tenella, Kindrogan, Perthshire, March 2008, det. Brian Coppins.

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Uploaded March 2009, last modified March 2013