Multi-element, cavate, box-like holococcolith with a pointed apical structure. The walls of the box and apical structure comprise narrow, birefringent, crystallographically distinct elements that are birefringent in XPL.
Small to medium-sized, thin-walled, box-like holococcolith with a gently curved upper surface.
Medium-sized, thin-walled, dome-like holococcolith. The thin, birefringent walls form a proximal plate and a domed upper surface. The dome broadens distally from the basal plate, and is of similar height and width or taller.
Small, thin-walled, cavate holococcolith with a domed upper surface. The cavate central-area space is filled with small, birefringent elements and at least two prominent vertical plates.
Small, elliptical to lenticular coccolith with a narrow, birefringent rim (as viewed in light microscope). When orientated at 0° the rim is crossed by narrow N-S and E-W extinction lines.
Specimens which cannot be assigned to any established species
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