Coccolithophyceae - Goniolithaceae
Parent taxon: Prymnesiophyceae according to K. Perch-Nielsen 1985
Sister taxa: Athenagalea, Biantholithus, Braarudosphaerales, Ceratolithaceae, Coccolithales, Daktylethra, Discoasterales, Ellipsagelosphaeraceae, Ellipsolithus, Gladiolithus, Ilselithina, Isochrysidales, Lanternithus, Minylitha, Neosphaera, Pedinocyclus, Phaeocystales, Prymnesiales, Rhomboasteraceae, Tetralithoides, Transversopontis, Zygodiscales, Sphenolithus, Eiffellithales, Prymnesiophycidae, Lapideacassaceae, Arkhangelskiales, Syracosphaerales, Cyclicargolithus, Discoasteroides, Calyptrosphaeraceae, Stephanolithiales, Eodiscoaster, Podorhabdales, Tetralithus, Watznaueriales
Subtaxa: Goniolithus
Ecology: passively mobile planktonic "photoautotroph"
Distribution: found only at Frauenweiler (Oligocene of Germany)