Montagnula is a genus of fungi in the family Didymosphaeriaceae. The genus, circumscribed by mycologist Augusto Napoleone Berlese in 1896, contains an estimated 24 species in 2008, but is probably polyphyletic as currently circumscribed. It was originally placed in family Montagnulaceae, before that family was dissolved and it was later placed in family Didymosphaeriaceae, with 34 species (in 2023).

The genus name of Montagnula is in honour of Jean Pierre François Camille Montagne (1784–1866), who was a French military physician and botanist who specialized in the fields of bryology and mycology.

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