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, Prymnesiophycidae, Podorhabdales, Goniolithaceae, Syracosphaerales, Sphenolithus, Lapideacassaceae, Tetralithus, Watznaueriales, Calyptrosphaeraceae, Discoasteroides, Stephanolithiales, Eiffellithales, Cyclicargolithus, Eodiscoaster, Arkhangelskiales
Subtaxa: Amaurolithus Angulolithina Ceratolithus Florisphaera Nicklithus Orthorhabdus
Type: Ceratolithus
Ecology: passively mobile planktonic "photoautotroph"
Distribution: