| details |
Hauterivian |
|
England(Yorkshire) |
Davey,R.J. Non-calcareous microplankton from the Cenomanian of England, northern France and North America. Part I. |
1969 |
| details |
Nd |
|
Nd |
Sarjeant,W.A.S. et al. The classification of dinoflagellate cysts above Generic Level |
1966 |
| details |
Early Cretaceous |
|
Europe |
de Jekhowsky,B. Bibliographical review of Hystrichospheres and dinoflagellates from the European Lower Cretaceous |
1965 |
| original |
Hauterivian |
|
England(Yorkshire) |
Neale,J.W. et al. Microplankton from the Speeton Clay of Yorkshire. |
1962 |