| details |
Emsian |
Early Eifelian |
|
Grahn,Y. Revision of Silurian and Devonian strata in Brazil |
1992 |
| details |
Late Emsian |
Eifelian |
Bolivia |
Racheboeuf,P.R. et al. The Devonian of Bolivia; biostratigraphy and chronostratigraphy. |
1993 |
| details |
Early Givetian |
|
|
Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2002 |
| details |
Early Givetian |
|
Paraguay |
Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2002 |
| details |
Early Givetian |
|
|
Grahn,Y. Devonian chitinozoan biozones of Western Gondwana. |
2005 |