Early Miocene (3)
Discoaster (12)
Sphenolithus (20)
Helicosphaera (14)
Micrantholithus crenulatus Bramlette & Sullivan, 1961
Description: Micrantholithus with crenulate edges.
Remarks:
Neogene: Micrantholithus
Paleogene: Micrantholithus crenulatus