Ustilaginoidea is a genus of fungi in the family Clavicipitaceae.

The genus contains 19 species.

[3] Ustilaginoidea was circumscribed by German botanist Julius Oscar Brefeld in 1895, with Ustilaginoidea oryzae assigned as the type species.

[4] Ustilaginoidea virens causes the disesase known alternatively as rice false smut, pseudosmut, or green smut.

This Sordariomycetes-related article is a stub.