Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               [Bikonta]
                 [Diaphoretickes Adl et al., 2012] see Superkingdom Corticata Lankester, 1878
                   [Kingdom Chromalveolata Adl et al., 2005 [polyphyletic?]] see Kingdom Chromista Caval.-Sm. (1981)
                     [Hacrobia Okamoto, Chantangsi, Horák, Leander & Keeling, 2009] see Subkingdom Hacrobia Okamoto, Chantangsi, Horák, Leander & Keeling, 2009
                       [Phylum Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000)] see Subphylum Haptophytina Caval.-Sm. (2015)
                         [Class Prymnesiophyceae D.J. Hibberd (1976)] see Class Coccolithophyceae Rothm. (1951)
                           Genus Acanthoica Lohmann (1902)
                           Genus Algirosphaera Schlauder (1945)
                           Genus Antosphaera
                           Genus Calicasphaera A. Kleijne (1991)
                           Genus Chrysotila P.L. Anand (1937)
                           Genus Coronosphaera K.R. Gaarder, in K.R. Gaarder & B.R.Heimdal (1977)
                           Genus Crycosphaera
                           Genus Cyrtosphaera A. Kleijne (1992)
                           Genus Gladiolithus R.W.Jordan & A.H.L.Chamberlain (1993)
                           Genus Helichosphaera
                           Genus Imantaria
                           Order Isochrysidales Pascher sensu Edvardsen & Eikrem (2000)
                           Genus Oolithus
                           Genus Polycrater I. Manton & K. Oates (1980)
                           [Family Ruttneraceae]
                           Genus Turrilithus R.W. Jordan, M. Knappertsbusch, W.R. Simpson & A.H.L. Chamberlain (1991)
                           0 [Subclass Prymnesiophycidae (D.J. Hibberd) Cavalier-Sm. (1986)] see Class Prymnesiophyceae D.J. Hibberd (1976)
                           n [Subclass Pavlovophycidae] see Class Pavlovophyceae J.C. Green & Medlin (2000)