Phylum Amoebozoa Lühe, 1913
   Subphylum Conosa Cavalier-Smith, 1998 see Infraphylum Conosa Cavalier-Smith, 1998
     Infraphylum Mycetozoa de Bary, 1859 ex Rostafinski, 1873 see Superclass Mycetozoa de Bary, 1859 ex Rostafinski, 1873
       Class Stelamoebea Cavalier-Smith, 2004
         Order Protostelida Olive & Stoianovitch, 1966
           Family Protosteliidae Olive, 1962
             Genus Protostelium Olive & Stoianovitch, 1960