| original |
Ludlovian |
|
France(Manche) |
Deunff,J. et al. The Ludlovian microplankton from the submerged formations of Les Minquiers (Manche), and its place in the distribution of the Silurian paleoplankton. |
1971 |
| details |
Late Ludlovian |
|
France |
Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. |
1976 |
| details |
Late Ludlovian |
|
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. 2: Index to Parts 1 and 2. |
1977 |
| details |
Late Ludlovian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |