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The new species Melanospora subterranea is described from China, based on morphological and phylogenetic analyses.This is the first record of Melanospora species parasitizing Chinese black and white truffles (Tuber indicum and T.huidongense), and its host range indicates that the new species may be a disease threat to commercially exploited European truffles including Tuber melanosporum and Tuber magnatum.Apparently polyphyly within the Ceratostomataceae can be explained at least in part by inadvertent sequencing of the host fungus rather than the parasite.