life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukarya Chatton, 1925 see Domain Eukaryota Chatton, 1925
     Kingdom Protoctista Hogg, 1860
       "Amitochondriates"
         Phylum Archaeprotista
           Class Metamonada Grassé, 1952 see Phylum Metamonada Grassé, 1952
             Subclass Retortamonadida see Order Retortamonadida Grassé, 1952
               Genus Chilomastix Alexeieff, 1910
               Genus Retortamonas Grassi, 1879