organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Plantae Haeckel (1866) - plants
     Phylum Cycadophyta Bessey (1907) see Subclass Cycadidae Pax (1894)
       Genus Bowenia Hook.f. (1863)
       Genus Ceratozamia Brongn. (1846)
       Genus Cycas L. (1753)
       Genus Dioon Lindl. (1843), nom. cons., orth. cons.
       Genus Encephalartos Lehm. (1834)
       Genus Macrozamia Miq. (1842)
       Genus Microcycas (Miq.) A.DC. (1868)
       Genus Stangeria T.Moore (1853)
       Genus Zamia L. (1763), nom. cons.