Fig. 2

3D-CXDI of coccoliths. a–c 3D-CXDI of coccoliths extracted from coccospheres and observed in: a distal view; b side view along the major axis; c side view along the major axis after sectioning half of the coccoliths. The angle α refers to the inclination of the shields. d In-plane thickness of the coccoliths resulting from the in-plane projection. e Images obtained by polarized light microscopy (PLM) displaying the distal view of coccoliths. Scale bar = 1 µm