Kingdom Protista (Haeckel, 1866) - protists
   Division Chrysophyta see Phylum Chrysophyta Pascher (1914)
     Class Coccolithophyceae Rothm. (1951)
       Genus †Sphenolithus G. Deflandre, in P.-P. Grassé, 1952
         †Sphenolithus belemnos
         †Sphenolithus ciperoensis
         †Sphenolithus distentus