Umbilicosphaera jordanii Bown, 2005d
Bown, P. R., 2005d. Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research 27(1), 21-95.
Umbilicosphaera jordanii
Bown, 2005d
Early Eocene
TDP Site 8, Singino Hill, Tanzania