| original |
Middle Devonian |
|
Ohio |
Wright,R.P. Occurrence, stratigraphic distribution and abundance of chitinozoa from the Middle Devonian Dolumbus Limestone of Ohio. |
1976 |
| details |
Late Emsian |
Givetian |
Indiana |
Wright,R.P. Biogeography of Middle Devonian chitinozoa of the Midwestern United States |
1978 |
| details |
Givetian |
|
Kentucky |
Wood,G.D. et al. Organic-walled microphytoplankton and chitinozoans from the Middle Devonian, (Givetian) Boyle Dolomite of Kentucky, USA. |
1985 |
| details |
Late Eifelian |
|
Brazil(Amazonas) |
Grahn,Y. Revision of Silurian and Devonian strata in Brazil |
1992 |
| details |
Early Givetian |
|
|
Grahn,Y. Revision of Silurian and Devonian strata in Brazil |
1992 |
| details |
Nd |
|
Nd |
Miller,M.A. Chitinozoa. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| 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 |