organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     flagellated protists
       Order Prymnesiida Cavalier-Smith see Phylum Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000)
         Suborder Prymnesiina Cavalier-Smith see Class Prymnesiophyceae D.J. Hibberd (1976)
           01 Genus Chrysochromulina J.B. Lackey (1939)
           02 Genus Chrysotila P.L. Anand (1937)
           03 Genus Corymbellus J.C. Green (1976)
           04 Genus Imantonia N. Reynolds (1974)
           05 Genus Isochrysis M. Parke (1949)
           06 Genus Phaeocystis G. Lagerheim (1893)
           07 Genus Prymnesium J. Massart (1920)
           08 Genus Calciosolenia Gran, in J. Murray & Hjort (1912)
           09 Genus Coccolithus E.H.L. Schwarz (1894)
           10 Genus Cruciplacolithus Hay & Mohler
           11 Genus Emiliania W.W. Hay & H. Mohler (1967)
           12 Genus Hymenomonas F. Stein (1878)
           13 Genus Papposphaera K. Tangen (1972)
           14 Genus Pleurochrysis E.G. Pringsheim (1955)
           15 Genus Syracosphaera Lohmann (1902)
           16 Genus Calyptrosphaera Lohmann, 1902
           17 ?Genus Balaniger H.A. Thomsen & K. Oates (1978)
           18 ?Genus Florisphaera Okada & Honjo (1973)
           19 ?Genus Wigwamma I. Manton et al.