Helicobasidiales Pachnocybales Platygloeales Pucciniales Septobasidiales Pucciniomycetes D.Hawksw., B.Sutton & Ainsw.

(1983) Pucciniomycetes (formerly known as Urediniomycetidae) is a diverse class of fungi in the subphylum Pucciniomycotina of phylum Basidiomycota.

Pucciniomycetes contains many economically important plant pathogenic fungal rusts; the order Pucciniales (formerly Uredinales) is the largest clade in this class, representing approximately 7,000 species.

They have simple septal pores without membrane caps, and disc-like spindle pole bodies.

Mannose is the major cell-wall carbohydrate; glucose, fucose, and rhamnose are the less prevalent neutral sugars; and xylose is not present.