Kingdom Protozoa Goldfuss, 1818 - protozoa
Status: extant
   Subkingdom Neozoa Cavalier-Smith, 1993 see Kingdom Protozoa Goldfuss, 1818
  Status: extant
     Infrakingdom Neomonada Cavalier-Smith, 1997
    Status: extant
       Phylum Neomonada Cavalier-Smith, 1997
      Status: extant
         Subphylum Mesomycetozoa Herr, Ajello, Taylor, Arseculeratne & Mendoza, 1999
        Status: extant
           Class Mesomycetozoea Ajello & Mendoza, 2000 see Class Ichthyosporea Cavalier-Smith, 1998
          Status: extant
             Order Ichthyophonida Cavalier-Smith, 1998
            Status: extant
               Genus Sphaerosoma J.P. Jøstensen et al., nom. illeg. see Genus Sphaeroforma Jøstensen et al., 2002
              Status: extant
                 Sphaerosoma arcticum J.P. Jøstensen et al. see Sphaeroforma arctica J.-P. Jøstensen et al., 2002
                Status: extant