Early Miocene (3)
Discoaster (12)
Sphenolithus (20)
Helicosphaera (14)
Heliolithus kleinpellii Sullivan, 1964
Description: Large, heliolith with two thin birefringent cycle. The narrow cycle is around 3/4 of the width of the wider cycle.
Remarks:
Paleogene: Heliolithus kleinpellii