Flat, elliptical, formed from six crystallographic blocks divided by near-radial sutures.
Elliptical, narrow rim copmosed of many small elements, vacant central area
Small, elliptical with complex, weakly birefringent, central plate
elliptical, with axial ridges & 8-10 perforations; formed of 4 blocks with diagonal sutures
Small, elliptical with open central area spanned by broad transverse bar (dark at 0°)
Elliptical, non-birefringent in plan view, with 10-16 pores
Elliptical, narrow dark rim copmosed of many small elements, central plate of birefringent blocks
Small, elliptical holococcolith with a narrow rim and small, bright transverse bar spanning the central area.
Cavate elliptical holococcolith; bars define 6 holes - 2 at ends and 4 at sides
Small, cavate, only known from side-view, steep-sided base with short, narrow spine and median septum
Specimens which cannot be assigned to any established species
