Phylum Cercozoa Cavalier-Smith, 1998 Order Cercomonadida Poche, 1913 - cercomonads Family Heteromitidae Kent, 1880 Genus Protaspis Skuja, 1939, nom. illeg. see Genus Protaspa A.T. Howe et al., 2011 Protaspis metarhiza Skuja, 1939