| original |
Middle Devonian |
|
Ohio |
Wood,G.D. Chitinozoa of the Silica Formation, (Middle Devonian, Ohio), vesicle ornamentation and paleoecology. |
1974 |
| details |
Early Emsian |
Early Eifelian |
Spain |
Diez,M.D.C.R. et al. Iberian chitinozoans. 2. Lower Devonian forms (La Vid Shales and equivalents). |
1978 |
| 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. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2002 |
| details |
Middle Devonian |
|
Ohio |
Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2002 |