Illosporiopsis christiansenii is a species of fungus that parasitizes lichen which is found in Europe and North America.

Illosporiopsis christiansenii can be identified by its bright pink conidia, approximately 0.5–1 mm across and 0.2–2 mm high,[3] which contrast strongly with the lichen it parasitizes.

[3] Illosporiopsis christiansenii is found throughout Europe and North America.

[1] Illosporiopsis christiansenii parasitizes lichen, including Parmelia, Physcia and Xanthoria.

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