overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Pontosphaera pulchra (Deflandre in Deflandre & Fert, 1954) Romein, 1979
Description: The plate is scalloped towards its outer edge and pierced by two holes, defining a transverse bar. The scalloping is defined by narrow radial ridges and furrows, which run inwards towards the centre.
Remarks: Like Pontosphaera pectinata but the two central holes are larger.
Neogene: Pontosphaera
Paleogene: Pontosphaera pulchra