Paleogene (9)
Coccolithales (2)
Coccoliths ord inc sed (2)
Discoasterales (4)
Holococcoliths (1)
Isochrysidales (2)
Mesozoic Survivors (4)
Nannoliths ord inc sed (5)
Syracosphaerales (3)
Zygodiscales (3)
Neogene (8)
Calcidiscaceae (5)
Coccolithaceae (6)
Mesozoic survivors are nannoplankton that survived the K-Pg mass extinction event 65.5 Ma.
Paleogene: Mesozoic Survivors