Agaricostilbomycetes

The Agaricostilbomycetes are a class of fungi in the subdivision Pucciniomycotina of the Basidiomycota. The class consists of a single order, six families, and 15 genera. Its type genus, Agaricostilbum was originally placed in Ascomycota, and later, Agaricomycotina, before being placed in Pucinniomycotina.
Most species are known only from their yeast states. Where known, basidiocarps are typically small and stilboid. They tend to by mycoparasitic or saprobic. Their spindle pole bodies are multi-layered and disc-shaped. They can have phragmo- or holo-basidia and they have tremelloid haustoria. The septal pores, have microbodies, which may resemble Woronin bodies of the Ascomycota.