| original |
Ludlovian |
|
Sweden |
Laufeld,S. Silurian chitinozoa from Gotland. |
1974 |
| details |
Middle Ludlovian |
Late Ludlovian |
Europe |
Jenkins,W.A.M. et al. Stratigraphic ranges of selected chitinozoa. |
1979 |
| details |
Ludlovian |
|
England(Shropshire) |
Dorning,K.J. Silurian chitinozoa from the type Wenlock and Ludlow of Shropshire, England. |
1981 |
| details |
Silurian |
|
Sweden |
Nestor,V.K. Correlation Fo the East-Baltic and Gotland Silurian by chitinozoans. |
1982 |
| details |
Silurian |
|
USSR(Estonian SSR) |
Nestor,V.K. Correlation Fo the East-Baltic and Gotland Silurian by chitinozoans. |
1982 |
| details |
Late Ludlovian |
|
Estonia |
Nestor,V. Biostratigraphy: Silurian chitinozoans |
1990 |
| details |
Pridolian |
|
Estonia |
Rubel,M. Biostratigraphy: Composite standard |
1990 |
| details |
Gorstian |
|
Belgium |
Andre,L. et al. Guidebook to the excursion on the stratigraphy and Magmatic Roc of the Brabant Massif, Belgium. |
1991 |
| details |
Ludlovian |
|
Sweden |
Verniers,J. et al. The chitinozoan biostratigraphy of the Silurian of the RonquiЁres-Monstreux area (Brabant Massif, Belgium) |
2002 |
| details |
Gorstian |
|
Belgium |
Verniers,J. et al. The chitinozoan biostratigraphy of the Silurian of the RonquiЁres-Monstreux area (Brabant Massif, Belgium) |
2002 |