Final Epithet
Helicosphaerella inversasera (Varol, 1991) Aubry, Liu, de Vargas, & Probert in Aubry & Bord, 2009
Basionym

Helicosphaera inversasera Varol, 1991

References

Aubry, M. -P., Bord, D., 2009. Reshuffling the cards in the photic zone at the Eocene/Oligocene boundary. In: Koeberl, C., Montanari, A. (eds), The Late Eocene Earth-Hothouse, Icehouse, and Impacts. Geological Society of America, Special Papers 452, 279-301.

Varol, O., 1991. New Cretaceous and Tertiary Calcareous Nannofossils. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 182, 211-237.