living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Embryobionta Cronquist, Takht. & W.Zimm.
         Division Magnoliophyta Cronquist, Takht. & Zimmerm. (1966) see Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996)
           Class Magnoliopsida Brongn. (1843)
             Subclass Rosidae Takht. (1967) see Superorder Rosanae Takht. (1967)
               Order Linales Baskerville (1839) see Order Malpighiales Juss. ex Bercht. & J.Presl (1820)
                 Family Ixonanthaceae Planch. ex Miq. (1858), nom. cons.
                   1 Genus Allantospermum Forman (1965)
                   2 Genus Cyrillopsis Kuhlmann (1925)
                   3 Genus Ixonanthes Jack (1822)
                   4 Genus Ochthocosmus Bentham (1843)
                   5 Genus Phyllocosmus Klotzsch (1857) see Genus Ochthocosmus Bentham (1843)