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
           Genus Retortamonas Grassi, 1879