Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Bacillariobiota Doweld (2001)
       Subkingdom Acanthocystobiotina Doweld, 2001
         Phylum Acanthometrozoa Doweld, 2001 [monotypic]
           Class Acanthometratea Doweld, 2001
             1 Order Acanthoplegmatida Doweld, 2001
             2 Order Amphilithiida Doweld, 2001
             3 Order Conaconida Doweld, 2001
             4 Order Acanthometrida Poche, 1913
             5 Order Actineliida Doweld, 2001 [monotypic]