Early Miocene (3)
Discoaster (12)
Sphenolithus (20)
Helicosphaera (14)
Emiliania Hay & Mohler in Hay et al. 1967
Description: Coccoliths with slits between all distal shield, and some proximal shield, elements; no bridge.
Remarks:
Type: Emiliania huxleyi.
Neogene: Emiliania; Emiliania huxleyi