Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Bacillariobiota Doweld (2001)
       Subkingdom Acanthocystobiotina Doweld, 2001
         Phylum Acanthocystozoa Doweld, 2001
           Class Gymnophryatea Mikrjukov & Mylnikov, 1998
             1 Order Gymnophryida Mikrjukov, 2000
             2 Order Amphitremida Doweld, 2001