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 Gigartinales F.Schmitz
                 Family Calosiphoniaceae Kylin (1932)
                   1 Genus Bertholdia F.Schmitz (1897), nom. illeg. see Genus Schmitzia P.C.Silva (1959)
                   2 Genus Calosiphonia H.M. Crouan & P.L. Crouan (1852)