overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Pontosphaera plana (Bramlette & Sullivan, 1961) Haq, 1971
Description: Simple unadorned plate, typically with two narrow longitudinal slits; margin narrow or inconspicuous.
Remarks: Pontosphaera inconspicua (Sullivan 1964) used for small, early specimens.
Neogene: Pontosphaera
Paleogene: Pontosphaera plana