Phylum [Choanozoa] Cavalier-Smith, 1981
Count: -
   Class Mesomycetozoea Ajello & Mendoza, 2000 see Class Ichthyosporea Cavalier-Smith, 1998
  Count: 2o;10g;14s
     Order Ichthyophonida Cavalier-Smith, 1998
    Count: 6g;7s
       Genus Sphaeroforma Jøstensen et al., 2002
      Count: 1s
         Sphaeroforma arctica J.-P. Jøstensen et al., 2002
        Count: -