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 |
Late Emsian |
Early Eifelian |
Brazil(Paraiba) |
Grahn,Y. Devonian chitinozoan biozones of Western Gondwana. |
2005 |
details |
Late Emsian |
Early Eifelian |
Brazil(Paraiba) |
Grahn,Y. Devonian chitinozoan biozones of Western Gondwana. |
2005 |