Agaricostilbomycetes Atractiellomycetes Classiculomycetes Cryptomycocolacomycetes Cystobasidiomycetes Microbotryomycetes Mixiomycetes Pucciniomycetes Spiculogloeomycetes Tritirachiomycetes Urediniomycotina Pucciniomycotina is a subdivision of fungus within the division Basidiomycota.

[4] The presence of simple septal pores, and disc-like spindle pole bodies unites Pucciniomycotina and distinguishes it from the sister groups.

[7] Pucciniomycotina have a diverse range of ecologies as insect parasites, mycoparasites, and orchid mycorrhiza; some have been detected in soil and water or asymptotic members living on leaves.

[4][8] Some members of the group are of economical importance as a pathogen on a wide range of commercial plants, e.g. wheat.

[4] Rust Fungi or plant pathogenic members in Puccinales have the most complex life cycles known in the fungal kingdom, with five different spore stages.