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 Bacillariophyceae Haeckel (1878) - pennates
             Order Pennales see Class Bacillariophyceae Haeckel (1878)
               Suborder Monoraphidineae Andrews (1976) see Order Achnanthales P.C.Silva (1962)
                 Family Achnanthaceae Kütz. (1844)
                   Genus Achnanthes Bory (1822)