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 Prostomatea Schewiakoff, 1896
             Order Prorodontida Corliss, 1974
               1 Family Plagiocampidae Kahl, 1926
               2 Family Malacophryidae Foissner, 1980
               3 Family Balanionidae Small & Lynn, 1985
               4 Family Urotrichidae Small & Lynn, 1985
               5 Family Placidae Small & Lynn, 1985
               6 Family Colepidae Ehrenberg, 1838
               7 Family Lagynidae Sola, Guinea, Longas & Fernández-Galiano, 1990, nom. illeg.
               8 Family Prorodontidaeᵀ Kent, 1881
               9 Family Holophryidae Perty, 1852