Coccolithophyceae - Syracosphaerales
Parent taxon: Prymnesiophyceae according to J. R. Young et al. 2003
Sister taxa: Biantholithus, Braarudosphaerales, Ceratolithaceae, Coccolithales, Daktylethra, Discoasterales, Ellipsagelosphaeraceae, Ellipsolithus, Gladiolithus, Ilselithina, Isochrysidales, Lanternithus, Minylitha, Neosphaera, Pedinocyclus, Phaeocystales, Prymnesiales, Rhomboasteraceae, Tetralithoides, Transversopontis, Zygodiscales, Eodiscoaster, Eiffellithales, Calyptrosphaeraceae, Prymnesiophycidae, Goniolithaceae, Tetralithus, Watznaueriales, Discoasteroides, Stephanolithiales, Lapideacassaceae, Sphenolithus, Arkhangelskiales, Cyclicargolithus, Podorhabdales
Subtaxa: Calciosoleniaceae Rhabdosphaeraceae Syracosphaeraceae Umbellosphaeraceae
Ecology: passively mobile planktonic "photoautotroph"
Distribution:
• Quaternary of Italy (2 collections)
• Pliocene of Italy (1)
• Miocene of Azerbaijan (1)
• Eocene of Jordan (1), Ukraine (1), the United Kingdom (1), United States (4: California, Georgia)
• Paleocene of Tanzania (1)
Total: 12 collections including 38 occurrences