Corticifraga is a genus of lichenicolous (lichen-dwelling) fungi in the family Gomphillaceae. The genus was established in 1990 and contains ten species that live as parasites on foliose lichens, mostly targeting species in the family Peltigeraceae. The produce no independent body (thallus) of their own, instead growing beneath the host's outer cortex and eventually producing small, dark fruiting bodies that break through the surface.

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