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Images of British Lichenicolous Fungi



Illosporiopsis christiansenii (B.L.Brady & D.Hawksw.) D.Hawksw.
 
(= Hobsonia christiansenii B.L.Brady & D.Hawksw.)


Ascomycota, Hypocreales: sporodichia forming soft, bright pink piles of coiled (helicoid) conidia on the host thallus. Widespread and frequent, recorded on a number of different lichen hosts, especially Physcia species and Xanthoria parietina.

Refs: useful taxonomic discussion in Sikoodi, M., et al (2001), Mycological Research 105 (4): 453-460 (includes publication of the generic name and combination). There are excellent depictions of this species at http://forum.pilze-bayern.de/index.php?topic=499.0)

Note that the superficially similar basidiomycete, Marchandiomyces corallinus, also occurs on Physcia and other lichens. It forms much more solid, bright pink coralloid sclerotia on dead and dying areas of the host thallus.

 
Illosporiopsis christiansenii on Physcia tenella
Illosporiopsis christiansenii on Physcia tenella
Illosporiopsis christiansenii on Physcia tenella, conidia
On Physcia tenella on unnamed garden prunings, Ralston, Renfrewshire (material provided by James McDonald), April 2011. Lowest photograph shows conidia.


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Uploaded May 2011, last modified March 2013