Division Haptophyta Hibberd
   Class Prymnesiophyceae D.J. Hibberd (1976) see Class Coccolithophyceae Rothm. (1951)
     Subclass Prymnesiophycidae (D.J. Hibberd) Cavalier-Sm. (1986) see Class Prymnesiophyceae D.J. Hibberd (1976)
       "Holococcoliths"
         Family Calyptrosphaeraceae Boudreaux & Hay (1969)
           Genus †Pharus F.H. Wind & S.W. Wise (1977), nom. illeg.