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 Hypotrichia (Stein, 1859) Cavalier-Smith, 1993
               Order Euplotida Small & Lynn, 1985
                 Suborder Euplotinaᵀ Small & Lynn, 1985
                   Family Gastrocirrhidae Fauré-Fremiet, 1961
                     1 Genus Gastrocirrhus Lepsi, 1928
                     2 Genus Euplotidium Noland, 1937
                     3 Genus Cytharoides Tuffrau, 1974[1975]