New and intriguing calcareous nannofossils from the Turonian (Upper Cretaceous) of Tanzania.

The preservation of exceptionally well-preserved, primary associations of calcareous nannofossils on lamina surfaces of shallowly-buried, uncemented, clay-rich Turonian sediments of coastal Tanzania has enabled us to document several intriguing new morphologies using the scanning electron microscope (SEM). Based on our new observations, we describe a new genus, Jimenezberrocosoia, and six new species, J. birchiae, Ellipsolithus...