Coccolithophyceae - Ceratolithaceae
Parent taxon: Coccolithophyceae according to R. E. Norris 1965
Sister taxa: Athenagalea, Biantholithus, Braarudosphaerales, Coccolithales, Daktylethra, Discoasterales, Ellipsagelosphaeraceae, Ellipsolithus, Gladiolithus, Ilselithina, Isochrysidales, Lanternithus, Minylitha, Neosphaera, Pedinocyclus, Phaeocystales, Prymnesiales, Rhomboasteraceae, Tetralithoides, Transversopontis, Zygodiscales, Discoasteroides, Sphenolithus, Watznaueriales, Cyclicargolithus, Lapideacassaceae, Goniolithaceae, Calyptrosphaeraceae, Podorhabdales, Arkhangelskiales, Eiffellithales, Eodiscoaster, Prymnesiophycidae, Tetralithus, Stephanolithiales, Syracosphaerales
Subtaxa: Amaurolithus Angulolithina Ceratolithus Florisphaera Nicklithus Orthorhabdus
Type: Ceratolithus
Ecology: passively mobile planktonic "photoautotroph"
Distribution: