Images of British Lichenicolous Fungi
Marchandiomyces corallinus (Roberge) Diederich & D. Hawksw.
(= Illosporium corallinum Roberge)
Basidiomycota, Ceratobasidiales: bright pink coralloid sclerotia (formerly believed to be sporodochia) on dead and dying areas of the host thallus. Widespread and often common on a number of different lichen hosts, especially Parmelia and Physcia species, frequently causing extensive die-back of Parmelia saxatilis on walls and boulders.
Refs: Hawksworth (1983), 31 (as I. corallinum).
Note that the superficially similar ascomycete, Illosporiopsis christiansenii, is also an aggressive parasite of lichens, including Physcia species, and may be passed over as M. corallinus. It forms paler pink sporodichia releasing a powder of somewhat spiralled ('helicoid') conidia.
|Parasitising and killing thallus of Parmelia sulcata, Lochwinnoch, Renfrewshire, October 2008|
|On Physcia aipolia, Fairlie Glen, Ayrshire (coll. Craig & Tracey Macdonald), October 2008.|
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Uploaded March 2009, last modified March 2013.