Discolithina japonica Takayama 1967
Discolithina millepuncta Gartner, 1967
Gartner, S., (1967): Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. - University of Kansas Paleontological Contributions, Papers. 29: 1-7.
Takayama, T., (1967): First report on nannoplankton of the Upper Tertiary and Quaternary of the southern Kwanto region, Japan. - Jahrbuch der Geologischen Bundesanstalt. 110: 169-198.
Discolithina japonica
Takayama, 1967
Pliocene
Upper Ilioka Formation, Kwanto Region, Japan