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 Prymnesiophyceae D.J. Hibberd (1976) see Class Coccolithophyceae Rothm. (1951)
             Order Isochrysidales Pascher (1910) see Order Isochrysidales Pascher sensu Edvardsen & Eikrem (2000)
               1 Family Prinsiaceae Hay & Mohler (1967)
               2 Family Isochrysidaceae Bourr. (1957), nom. cons.
               3 Family Ochrosphaeraceae
               4 Family Hymenomonadaceae Senn (1900)
               5 ?Family Amphimonadaceae
               6 ?Family Derepyxidaceae see Genus Derepyxis A.C. Stokes, 1885a