Phylum Sarcomonada Cavalier-Smith, 1993 see Class Sarcomonadea Cavalier-Smith, 1993
   Class Cercomonadea K.A. Mikrjukov, 2000 see Class Sarcomonadea Cavalier-Smith, 1993
     Order Dimorphida Siemensma, 1991 see Order Heliomonadida Cavalier-Smith, 1993
       Genus Tetradimorpha Hsiung, 1927
         Tetradimorpha pterbica Mikrjukov & Patterson, in Mikrjukov, 2000 see Tetrahelia pterbica (Mikrjukov & Patterson, 2000)