| details |
Early Ypresian |
|
Southern Hemisphere |
Williams,G.L. et al. Southern Ocean and Global Dinoflagellate Cyst Events compared: Index events for the Late Cretaceous-Neogene. |
2004 |
| details |
Early Ypresian |
|
Northern Hemisphere |
Williams,G.L. et al. Southern Ocean and Global Dinoflagellate Cyst Events compared: Index events for the Late Cretaceous-Neogene. |
2004 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |
| original |
Early Ypresian |
|
Europe |
Stover,L.E. et al. A revision of the Paleogene dinoflagellate genera Areosphaeridium Eaton 1971 and Eatonicysta Stover Abd Evitt 1978 |
1995 |