Coccolithophyceae - Prymnesiophycidae - Prymnesiophycidae
Parent taxon: Prymnesiophycidae according to P. R. Bown and J. R. Young 1997
Sister taxa: Braarudosphaeraceae, Centosphaera, Ceratolithina, Ceratolithoides, Chiphragmalithus, Coccolithites, Coccolithus, Cricolithus, Cruciplacolithus, Discoaster, Eoconusphaeraceae, Haqius, Kokia, Liliasterites, Markalius, Marthasterites, Nannoconaceae, Neochiastozygus, Orthogonoides, Pontosphaera, Prinsiosphaera, Prolatipatella, Repagulum, Rhabdolithus, Schizosphaerellaceae, Tortolithus, Triquetrorhabdulus, Watkinsia, Zygolithus, Zygrhablithus
Subtaxa: Lithraphidites Microrhabdulinus Microrhabduloidus Microrhabdulus Pseudolithraphidites Pseudomicula
Ecology: passively mobile planktonic "photoautotroph"
Distribution:
• Paleocene of Indian Ocean (2 collections)
• Cretaceous to Paleogene of North Atlantic (1)
• Cretaceous of Argentina (11), Austria (1), Canada (1: Alberta), Germany (1), Indian Ocean (28), North Atlantic (4), North Pacific (9), South Pacific (1), Tanzania (5), United States (7: Alabama, Arkansas, Mississippi)
Total: 71 collections including 87 occurrences