Helicosphaera watkinsii da Gama & Varol, 2013
da Gama, R. O. B. P., Varol, O., 2013. New Late Oligocene to Miocene Species. Journal of Nannoplankton Research 33(1), 1-12.
Helicosphaera watkinsii
da Gama & Varol, 2013
Early Miocene
DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean