Irish lichens

Illosporiopsis christiansenii on Physcia tenella

Ascomycota
Incertae sedis

Species: Illosporiopsis christiansenii

Lichenicolous fungus
Parasitic on Physcia tenella. Macroom, Co. Cork, SW Ireland.

The sporodichia form soft, pink mounds of coiled conidia on the host thallus. The conidia have a spiral appearance.
Microscope photograph below.

Widespread, often in nitrogen-rich conditions on a number of hosts including Physcia species and Xanthoria parietina.



Illosporiopsis christiansenii on Physcia tenella

Microscope photograph
Illosporiopsis christiansenii, microscopy x 400
Illosporiopsis christiansenii on Physcia tenella. November 2010

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