| original |
Siegenian |
Givetian |
Canada(Ontario) |
Playford,G. Lower to Middle Devonian acritarchs of the Moose River Basin, Ontario. |
1977 |
| details |
Givetian |
|
Ohio |
Wicander,R. et al. Systematics and biostratigraphy of the organic-walled microphytoplankton from the Middle Devonian, (Givetian), Silica Formation, Ohio, USA. |
1981 |
| details |
Late Siegenian |
Middle Givetian |
Canada(Ontario) |
Wicander,R. A catalogue and biostratigraphic distribution of North American Devonian acritarchs. |
1983 |
| details |
Givetian |
|
Ohio |
Wicander,R. A catalogue and biostratigraphic distribution of North American Devonian acritarchs. |
1983 |
| details |
Eifelian |
|
Ohio |
Wicander,R. et al. Organic-walled microphytoplankton abundance and stratigraphic distribution from the Middle Devonian Columbus and Delaware Limestones of the Hamilton Quarry, Marion County, Ohio |
1983 |
| details |
Late Siegenian |
Middle Givetian |
North America |
Wicander,R. Middle Devonian acritarch biostratigraphy of North America |
1984 |
| 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 |
Givetian |
|
New York |
Wood,G.D. Some Middle Devonian, (Givetian), chitinozoans and acritarchs from New York State. Preliminary results. |
1986 |
| details |
Givetian |
Frasnian |
Argentina(Salta) |
Barreda,V.D. Givetian - Frasnian acritarchs of the Noroeste Basin, Salta Province, Argentina. |
1986 |
| details |
Emsian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Eifelian |
Givetian |
Kentucky |
Huysken,K.T. et al. Palynology and biostratigraphy of selected Middle and Upper Devonian Black-Shale sections in Kentucky |
1992 |
| details |
Middle Givetian |
Middle Frasnian |
Argentina(Salta) |
Rubinstein,C.V. Palynological investigations in the Lower Paleozoic of Argentina |
1993 |
| details |
Late Givetian |
Early Frasnian |
Argentina(Salta) |
Ottone,E.G. Devonian palynomorphs from the Los Monos Formation, Tarija Basin, Argentina |
1996 |
| details |
Siegenian |
Givetian |
Canada(Ontario) |
Ottone,E.G. Devonian palynomorphs from the Los Monos Formation, Tarija Basin, Argentina |
1996 |