root | cellular organisms | Eukaryota | Opisthokonta | Fungi | Dikarya | Basidiomycota | Ustilaginomycotina | Exobasidiomycetes | Exobasidiales | Exobasidiaceae | Exobasidium | Exobasidium gracile
|  | superkingdom | clade | kingdom | subkingdom | phylum | subphylum | class | order | family | genus | species