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 Oxymonadida Grassé, 1952 - oxymonads
         Family Oxymonadidae Kirby, 1928
           1 Genus Oxymonas Janicki, 1915
           2 Genus Barroella Zeliff, 1944
           3 Genus Microrhopalodina Grassi, 1911
           4 Genus Proboscidiella Kofoid & Swezy, 1926 see Genus Microrhopalodina Grassi, 1911
           5 Genus Opisthomitus Grassé, 1952 see Genus Microrhopalodina Grassi, 1911
           6 Genus Sauromonas Grassé & Hollande