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
               Family Condylostomatidae Kahl, in Doflein & Reichenow, 1929
                 1 Genus Condylostoma Bory de St. Vincent, 1826
                 2 Genus Condylostomides da Silva Neto, 1994
                 3 Genus Linostoma Jankowski, 1978, nom. illeg. see Genus Linostomella Aescht, 1999