Coccolithophyceae - Eiffellithales
Parent taxon: Prymnesiophyceae according to P. R. Bown and J. R. Young 1997
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, Prymnesiophycidae, Lapideacassaceae, Arkhangelskiales, Syracosphaerales, Goniolithaceae, Cyclicargolithus, Discoasteroides, Calyptrosphaeraceae, Stephanolithiales, Eodiscoaster, Podorhabdales, Tetralithus, Watznaueriales
Subtaxa: Chiastozygaceae Eiffellithaceae Rhagodiscaceae
Ecology: passively mobile planktonic "photoautotroph"
Distribution:
• Miocene of Slovenia (1 collection)
• Paleocene of Argentina (7), Tanzania (1), United States (2: Missouri)
• Cretaceous of Argentina (31), Austria (1), Belgium (1), Canada (7: Alberta), France (1), Germany (1), Israel (1), Romania (1), South Atlantic (1), Spain (67), Tanzania (7), United States (4: Alabama, Georgia, Kansas)
• Jurassic of Canada (1: Alberta), Germany (8), Morocco (3), Saudi Arabia (3), Spain (120), Switzerland (1)
Total: 270 collections including 662 occurrences