Cruciplacolithus primus Perch-Nielsen, 1977a
The calculated size of the holotype is 5.5µm.
Medium size (5.0-8.0µm) Cruciplacolithus with a narrow tube cycle and a central area with axial cross-bars
Perch-Nielsen, K.,1977a. Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39, 699-823.
DSDP Leg 39, Sites 356, Sào Paulo Plateau, South Atlantic Ocean