[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Centrohelida Kühn, 1926 see Order Centrohelida Kühn, 1926
       Acanthocystidae Claus, 1874
         1 Genus Acanthocystis Carter, 1863
         2 Genus Choanocystis Penard, 1904
         3 Genus Echinocystis Mikrjukov, 1997
         4 Genus Pseudoraphidiophrys Mikrjukov, 1997
         5 Genus Pseudoraphidocystis Mikrjukov, 1997
         6 Genus Pterocystis Siemensma & Roijackers, 1988