organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     alveolates Cavalier-Smith see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Ciliophora Doflein, 1901 - ciliates
         Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
           Class Nassophorea Small & Lynn, 1981
             Order Microthoracida Jankowski, 1967
               Family Microthoracidaeᵀ Wrzesniowski, 1870
                 1 Genus Trochiliopsis Penard, 1922
                 2 Genus Stammeridium Wenzel, 1969
                 3 Genus Microthorax Engelmann, 1862
                 4 Genus Drepanomonas Fresenius, 1858
                 5 Genus Leptopharynx Mermod, 1914