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 Postciliodesmatophora Gerassimova & Seravin, 1976 - desmates
           Class Heterotrichea Stein, 1859
             Order Heterotrichidaᵀ Stein, 1859 - heterotrichs
               1 Family Folliculinidae Dons, 1914
               2 Family Peritromidae Stein, 1867
               3 Family Stentoridae Carus, 1863
               4 Family Blepharismidae Jankowski, in Small & Lynn, 1985
               5 Family Spirostomidae Stein, 1867
               6 Family Condylostomatidae Kahl, in Doflein & Reichenow, 1929
               7 Family Climacostomidae Repak, 1972