Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Peridiniobiota Starobogatov ex Doweld (2001)
       Subkingdom Parameciobiotina Starobogatov, 1986 [monotypic]
         Phylum Parameciozoa Kussakin & Drozdov, 1998
           Subphylum Oxytrichozoina Doweld, 2001
             Class Spathidiatea Doweld, 2001
               Subclass Spathidiatinea Doweld, 2001
                 Order Amphileptida Doweld, 2001 [monotypic]
                   Family Amphileptidae Bütschli, 1889
                     1 Genus Amphileptus Ehrenberg, 1830