Domain Eucaryota
   Subdomain Amoebota Doweld (2001)
     Kingdom Amoebobiota Doweld, 2001
       Subkingdom Coelodendrobiotina Doweld, 2001
         Phylum Coelodendrozoa Doweld, 2001
           Class Cyrtocalpatea Doweld, 2001
             Order Thalassicollida Doweld, 2001
               Family Thalassicollidae Haeckel, 1862
                 1 Genus Thalassicolla Huxley, 1851