| original |
Early Oligocene |
Middle Oligocene |
China(Hopei) |
Jiabo On the Paleogene dinoflagellates and acritarchs from the Coastal Region of Bohai. |
1978 |
| details |
Early Oligocene |
Middle Oligocene |
China(Hopei) |
Islam,M.A. Review of the fossil dinioflagellate Cleistosphaeridium. |
1993 |
| details |
Late Paleocene |
|
Spain |
Orue-Etxebarria,X. et al. Physical and biostratigraphic analysis of two prospective Paleocene -Eocene, boundary stratotypes in the intermediate-Deep Water Basque Basin, Western Pyrenees: the Trabakua Pass and Ermua sections |
1996 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |