Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Rozellomycota Doweld (2013)
     Class Microsporidea Corliss & Levine, 1963
       Genus Geusia Rühl & Korn, 1979, incertae sedis [monotypic]
         1 Geusia gamocystisᵀ Rühl & Korn, 1979