Helicosphaera vedderi Bukry, 1981b
Bukry, D., 1981b. Pacific coast coccolith stratigraphy between Point Conception and Cabo Orientes, Deep Sea Drilling Project Leg 63. Initial Reports of the Deep Sea Drilling Project 63, 445-471.
Helicosphaera vedderi
Bukry, 1981
Early Miocene
California Continental Borderland, USA