| details |
Late Llandoverian |
Early Wenlockian |
Guinea |
Villeneuve,M. et al. New palaeontological data from the Palaeozoic series of the Bove Basin, (Guinea, West Africa); Stratigraphical consequences. |
1989 |
| details |
Middle Llandoverian |
Early Wenlockian |
Brazil(Amazonas) |
Grahn,Y. et al. Age and correlation of the Trombetas Group, Amazonas Basin, Brazil. |
1992 |
| details |
Late Telychian |
Early Homerian |
Worldwide |
Paris,F. Chitinozoan biostratigraphy and palaeoecology. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |