Coccolithophyceae - Prymnesiophycidae - Prymnesiophycidae
Parent taxon: Prymnesiophycidae according to P. R. Bown and J. R. Young 1997
Sister taxa: Centosphaera, Ceratolithina, Ceratolithoides, Chiphragmalithus, Coccolithites, Coccolithus, Cricolithus, Cruciplacolithus, Discoaster, Eoconusphaeraceae, Haqius, Kokia, Liliasterites, Markalius, Marthasterites, Microrhabdulaceae, Nannoconaceae, Neochiastozygus, Orthogonoides, Pontosphaera, Prinsiosphaera, Prolatipatella, Repagulum, Rhabdolithus, Schizosphaerellaceae, Tortolithus, Triquetrorhabdulus, Watkinsia, Zygolithus, Zygrhablithus
Subtaxa: Braarudosphaera Bukryaster Micrantholithus Pentaster Quinquerhabdus Trapezopentus
Ecology: passively mobile planktonic "photoautotroph"
Distribution:
• Quaternary of Ireland (1 collection)
• Miocene of Azerbaijan (2), India (1), Slovakia (2), Slovenia (1)
• Oligocene of Germany (1)
• Eocene of Namibia (1), Tonga (1), the United Kingdom (1), United States (4: California, Georgia)
• Paleocene of Argentina (2), United States (3: Missouri, South Carolina)
• Cretaceous of Argentina (1), Austria (1), Canada (2: Alberta), France (1), Germany (1), Israel (1), Slovakia (2), Spain (26)
Total: 55 collections including 82 occurrences