Phylum [Choanozoa] Cavalier-Smith, 1981
   Class Mesomycetozoea Ajello & Mendoza, 2000 see Class Ichthyosporea Cavalier-Smith, 1998
     Order Ichthyophonida Cavalier-Smith, 1998
       Genus Psorospermium Hilgendorf, 1883, nom. illeg. see Genus Psorospermis Cavalier-Smith, 2012
         1 Psorospermium haeckeli Hilgendorf, 1883, orth. inval. see Psorospermium haeckelii Hilgendorf, 1883