Kingdom Fungi R.T.Moore (1980) - fungi
   Phylum Rozellomycota Doweld (2013)
     Class Microsporidea Corliss & Levine, 1963
       Order Dissociodihaplophasida Sprague, Becnel & Hazard, 1992
         Family Spragueidae Weissenberg, 1976
           Genus Tetramicra Matthews & Matthews, 1980 [monotypic]
             1 Tetramicra brevifilumᵀ Matthews & Matthews, 1980