(Manton, J. Sutherl. & Oates) H.A. Thomsen et al. (1991: 640, figs 2-4, 9, 12)
(original name of HET phase): Papposphaera sagittifera Manton, J.Sutherl. & McCully (Manton et al., 1976b)
Turrisphaera borealis Manton, J.Sutherl. & Oates (Manton et al., 1976c: 187–188, pl. 1, figs 3–11; pl. 2, figs 12–17; pl. 3, figs 18–23)
Coccospheres 4–8 μm; coccoliths 1.5–2 μm; central areas with an axial cross and 2–4 additional longitudinal bars; process 2–4 μm high, with a small calyx of 4 radially diverging blades.
58º51'S 139º50'E Findlay & Giraudeau (2000)
Family Papposphaeraceae description: Diploid phase motile; coccospheres covered in pappoliths. A central process is often prominent. Each pappolith is constructed of a rim of two lath types, one small and confined to the proximal part of the wall, the other vertically expanded; central area with variable structures. Haploid phase motile, with holococcoliths typically with tower-like forms.