organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     amoeboid protists
       Class Polycystina Ehrenberg, 1838 see Class Polycystinea Ehrenberg, 1838
         Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
           Family Artostrobiidae Riedel, 1967
             1 Genus Botryostrobus Haeckel, 1887
             2 Genus Phormostichoartus Campbell, 1951
             3 Genus Spirocyrtis Haeckel, 1881