Hayella simplex Bown & Dunkley Jones, 2006
Bown, P. R. & Dunkley Jones, T. 2006. New Paleogene calcareous nannofossil taxa from coastal Tanzania: Tanzania Drilling Project Sites 11 to 14. Journal of Nannoplankton Research 28(1): 17-34.
Hayella simplex
Bown & Dunkley Jones, 2006
Middle Eocene
TDP Site 2, Kilwa Masoko, Tanzania