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 Spirotrichea Bütschli, 1889
             Subclass Oligotrichia Bütschli, 1889
               Order Strombidiida Petz & Foissner, 1992
                 Family Strombidiidaeᵀ Fauré-Fremiet, 1970
                   1 Genus Tontonia Fauré-Fremiet, 1961
                   2 Genus Laboea Lohmann, 1908
                   3 Genus Cyrtostrombidium Lynn & Gilron, 1993
                   4 Genus Strombidium Claparède & Lachmann, 1859