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 Thallobionta
         Division Chromophycota see Phylum Chromophyta T.A.Chr. (1962), nom. nud.
           Class Phaeophyceae Hansgirg (1886) - brown algae
             Order Chordariales
               Family Spermatochnaceae
                 Genus Spermatochnus F.T. Kützing, 1843, nom. rej.