| original |
Ludlovian |
|
Sweden |
Laufeld,S. Silurian chitinozoa from Gotland. |
1974 |
| details |
Early Ludlovian |
Early Gedinnian |
Spain |
Cramer,F.H. et al. Iberian chitinozoans |
1978 |
| details |
Ludlovian |
|
Europe |
Jenkins,W.A.M. et al. Stratigraphic ranges of selected chitinozoa. |
1979 |
| details |
Early Ludlovian |
|
Belgium |
Verniers,J. The Silurian of the Mehaigne Valley, (Brabant Massif, Belgium) |
1981 |
| details |
Ludlovian |
|
Sweden |
Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. |
1981 |
| details |
Ludlovian |
|
Europe |
Paris,F. The chitinozoans in the Paleozoic of Southwest Europe. |
1981 |
| details |
Early Ludlovian |
Middle Ludlovian |
Belgium |
Verniers,J. The Silurian chitinozoa of the Mehaigne area (Brabant Massif, Belgium). |
1982 |
| details |
Ludlovian |
|
Greenland |
Grahn,Y. et al. Chitinozoans from Ordovician and Silurian Shelf and Slope sequences in North Greenland. (In: Palaeozoic fossils and stratigraphy from North Greenland) |
1989 |