Moniliella is a genus of fungi in the subdivision Ustilaginomycotina. It is in the monotypic family Moniliellaceae Q.M. Wang, F.Y. Bai & Boekhout, which is in the monotypic order Moniliellales Q.M. Wang, F.Y. Bai & Boekhout which is in the monotypic class Moniliellomycetes Q.M. Wang, F.Y. Bai & Boekhout.
The family, order and class were originally labelled as incertae sedis. Until 2014, when Moniliellaceae was formed.
Some species of Moniliella can cause disease in humans, and also in cats. The genus includes the black, yeast-like fungi in the Basidiomycota, although the black, yeast-like fungi also include some species from the Ascomycota.
