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
           Genus Opisthomitus Grassé, 1952 see Genus Microrhopalodina Grassi, 1911