organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     flagellated protists
       Order Retortamonadida Grassé, 1952 - retortamonads
         Family Retortamonadidae Wenrich, 1932
           1 Genus Retortamonas Grassi, 1879
           2 Genus Embadomonas Mackinnon, 1911 see Genus Retortamonas Grassi, 1879
           3 Genus Plagiomonas Grassi, 1881 see Genus Retortamonas Grassi, 1879
           4 Genus Waskia Wenyon & O'Connor, 1917 see Genus Retortamonas Grassi, 1879
           5 Genus Chilomastix Alexeieff, 1910
           6 Genus Macrostoma Alexeieff, 1909 see Genus Chilomastix Alexeieff, 1910
           7 Genus Fanapetia see Genus Chilomastix Alexeieff, 1910