without diagonal bar
Coccolithus streckeri Takayama & Sato 1987
Medium to large size (4.0-10.0µm), elliptical species of Coccolithus Schwarz (1894) having a vast central opening often spanned by a diagonal bar.
Takayama, T. & Sato, T., (1987): Coccolith biostratigraphy of the North Atlantic Ocean, Deep Sea Drilling Project Leg 94. - Initial Reports of the Deep Sea Drilling Project. 94: 651-702.
Coccolithus streckeri
Takayama & Sato, 1987
Late Pliocene
DSDP Leg 94, Site 608, North Atlantic Ocean