Lohmann (1902: 134, pl. 4, figs 33, 36a, b, 37)
HOL phase synonyms: Calyptrosphaera oblonga Lohmann (1902)Calyptrosphaera (Daktyletha) pirus Kamptner (1937)
Coccospheres 15–25 μm. XCs dome-shaped; rim subhorizontal, flange-like; numerous elements with wide slits; central part formed of several cycles of laths. Central area with a conical depression. BCs 4.5–8 μm; mid-wall flange prominent; inner wall-cycle well developed; central area with 3 concentric cycles of thin radial laths, occasionally with a small central spine. CFCs similar, with a robust bifurcate spine.
64º16'S 136º06'E Nishida (1986)
Both holococcolithophore species have been found in combination form with S. pulchra.