| details |
Wenlockian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Silurian |
|
France(Herault) |
Deflandre,G. On the Hystrichospheres of Silurian Limestone from Black Mountain |
1942 |
| original |
Silurian |
|
France(Herault) |
Deflandre,G. Microfossils from the Silurian Limestones of Montagne Noire. |
1944 |
| details |
Silurian |
|
Nd |
Deflandre,G. The problem of Hystrichospheres. |
1947 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |
| original |
Middle Clintonian |
Late Clintonian |
New York |
Fisher,J.C. The Hystrichosphaerids in the Clinton Group, (Silurian), of New York State. |
1955 |
| details |
Gothlandian |
|
France |
Timofeev,B.V. Spores and phytoplankton from Proterozoic and Early Paleozoic of Eurasia. |
1960 |
| details |
Frasnian |
|
Belgium |
Stockmans,F. et al. Hystrichospheres of the Belgian Devonian (Wepion Drilling). |
1962 |