[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Supergroup Chromalveolata Adl et al., 2005 - chromalveolates see Kingdom Chromista Caval.-Sm. (1981)
       Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000) see Subphylum Haptophytina Caval.-Sm. (2015)
         Prymnesiophyceae D.J. Hibberd (1976) see Class Coccolithophyceae Rothm. (1951)
           Coccolithales Schwarz (1932)
             1 Genus Balaniger H.A. Thomsen & K. Oates (1978)
             2 Genus Calciosolenia Gran, in J. Murray & Hjort (1912)
             3 Genus Coccolithus E.H.L. Schwarz (1894)
             4 Genus Hymenomonas F. Stein (1878)
             5 Genus Pleurochrysis E.G. Pringsheim (1955)
             6 Genus Reticulosphaera K.G. Grell (1989)
             7 Genus Wigwamma I. Manton et al.