Figure 1. LM of live cell.
Cells have one main flagellum, many yellow-brown chloroplasts and a regular silica skeleton with 5-11 spines, predominant form has octagonal shape and 8 spines.
Dimensions of skeletons are ca 27 µm without spines
Throndsen J, Heimdal BR,1993. A guide to naked flagellates and coccolithophorids. In Marine phytoplankton. Ed. Tomas C. Academic Press. pp 263