Domain Eucaryota
Status: extant; Count: [*†*] 11k;97p;151c;401o;832f;181g;3s; †13p;32c;87o;175f;72g;3s
   Subdomain Chlorota Doweld (2001)
  Status: extant; Count: [*†*] 5k;64p;91c;384o;817f;166g;3s; †13p;32c;87o;175f;72g;3s [20 Nov 2022]
     Kingdom Peridiniobiota Starobogatov ex Doweld (2001)
    Status: extant; Count: [*] 7p;21c;24o;18f;17g [16 Sep 2022]
       Subkingdom Parameciobiotina Starobogatov, 1986 [monotypic]
      Status: extant; Count: [*] 1p;10c;18o;12f;12g [16 Sep 2022]
         Phylum Parameciozoa Kussakin & Drozdov, 1998
        Status: extant; Count: [*] 10c;18o;12f;12g [16 Sep 2022]
           Subphylum Parameciozoina Doweld, 2001
          Status: extant; Count: [*] 6c;7o;4f;4g [16 Sep 2022]
             Class Podophryatea Doweld, 2001
            Status: extant; Count: [*] 5o;2f;2g
               Subclass Spirochonatinea Doweld, 2001
              Status: extant; Count: [*] 3o;1f;1g [21 Nov 2022]
                 Order Spirochonida Doweld, 2001
                Status: extant; Count: [*] 1f;1g
                   Family Spirochonidae Stein, 1854
                  Status: extant; Count: [*] 1g
                     1 Genus Spirochona Stein, 1852
                    Status: extant; Count: -