overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Pontosphaera alta Roth, 1970
Description: Pontosphaera with an elevated, birefringent rim and a thin, low birefringence plate with a large number of small perforations.
Remarks:
Neogene: Pontosphaera
Paleogene: Pontosphaera alta