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 Nassophorea Small & Lynn, 1981
             Order Synhymeniida de Puytorac et al., 1974
               Family Nassulopsidae Deroux, in Corliss, 1979
                 1 Genus Phasmatopsis Deroux, 1978, nom. illeg. see Genus Beersena Jankowski, 1989
                 2 Genus Nassulopsis Fauré-Fremiet, 1959