overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Calcidiscus pacificanus (Bukry, 1971) Varol, 1989
Description: Medium to large (6-9 µm) circular-subcircular placoliths with closed central area. Shield elements clearly visible and the proximal shield is typically significantly smaller then the distal.
Remarks:
Neogene: Calcidiscus
Paleogene: Calcidiscus pacificanus