Kalmusia is a genus of fungi in the family Didymosphaeriaceae.
[3] The genus was formerly placed in family Montagnulaceae,[4] before that was dissolved.
[6] The genus name of Kalmusia is in honour of Jakub Kalmus (1834 - 1870), who was a Bohemian doctor and Cryptogam researcher, who was a friend of the plant author.
[7] The genus was circumscribed by Gustav Niessl von Mayendorf in Verh.
Vereins Brünn vol.10 on page 204 in 1872.