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 Rhodophycota see Phylum Rhodophyta Wettst. (1901)
           Class Rhodophyceae Thuret (1855) - red algae see Phylum Rhodophyta Wettst. (1901)
             Subclass Florideophycideae see Class Florideophyceae Cronquist (1960)
               Order Cryptonemiales Schmitz (1892)
                 Family Dumontiaceae Bory (1828)
                   1 Genus Dilsea Stackhouse (1809)
                   2 Genus Farlowia J.Agardh (1876)
                   3 Genus Pikea Harvey (1853)
                   4 Genus Cryptosiphonia J.Agardh (1876)
                   5 Genus Dudresnaya P.L. Crouan & H.M. Crouan (1835), nom. cons.
                   6 Genus Dumontia J.V.F. Lamouroux (1813)