Helicosphaerella antistrofaobliqua Varol, in prep.
From Greek, antistrofa, reverse- referring opposite direction widening of Helicosphaerella obliqua Bramlette & Wilcoxon, 1967) Aubry, Liu, de Vargas, & Probert in Aubry & Bord (2009).
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.
Bramlette, M. N., Wilcoxon, J. A., 1967. Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. Tulane Studies in Geology and Paleontology 5, 93-131.
Helicosphaerella antistrofaobliqua
Varol, in prep.
Late Oligocene
Angola, West Africa