overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Helicosphaera scissura Miller, 1981
Description: Like H. ampliaperta but with slit rather than wide opening in central-area.
Remarks:
Original description:
Neogene: Helicosphaera; Helicosphaera scissura