| details |
Late Aptian |
|
Nd |
Lentin,J.K. et al. Fossil dinoflagellates: index to genera and species. |
1973 |
| details |
Early Aptian |
|
Atlantic Coast Offshore |
Gradstein,F.M. et al. Mesozoic and Cenozoic stratigraphy of the Atlantic Continental Margin, eastern Canada. |
1976 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |
| details |
Early Cretaceous |
|
Germany |
Davey,R.J. et al. The genus Hystrichosphaeridium and its allies. (In: Studies on Mesozoic and Cainozoic Dinoflagellate Cysts. R.J.Davey, C.Downie, W.A.S.Sarjeant and G.L.Williams) |
1966 |
| details |
Late Aptian |
|
W.Germany(Schleswig) |
Eisenack,A. Cordosphaeridium n.g., ex Hystrichosphaeridium, Hystrichosphaeridea |
1963 |