Zwackhiomyces calcariae is a species of lichenicolous fungus in the family Xanthopyreniaceae.

It was first formally described in 1896 by French lichenologist Camille Flagey, as Arthopyrenia calcariae.

[2] Josef Hafellner and Nikolaus Hoffmann transferred it to the genus Zwackhiomyces in 2000.

[3] The fungus is parasitic on lichens in genus Aspicilia.

This Dothideomycetes-related article is a stub.