Sphenolithus perpendicularis Shamrock, 2010
Sphenolithus kempii Bown & Dunkley Jones, 2012
This species is possibly a preservational morphotype of Sphenolithus stellatus Gartner, 1967a.
Bown, P. R., Dunkley Jones, T., 2012. Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research 32(2), 3-51.
Gartner, S., 1967a. Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. University of Kansas Paleontological Contributions, Papers 29, 1-7.
Shamrock, J. L., 2010. A new calcareous nannofossil species of the genus Sphenolithus from the Middle Eocene (Lutetian) and its biostratigraphic significance. Journal of Nannoplankton Research 31(1), 5-10.
Sphenolithus perpendicularis
Shamrock, 2010
Middle Eocene
ODP Leg 122, Hole 762C, Exmouth Plateau, western Australia