| original |
Siegenian |
Givetian |
Canada(Ontario) |
Playford,G. Lower to Middle Devonian acritarchs of the Moose River Basin, Ontario. |
1977 |
| details |
Late Siegenian |
Early Eifelian |
Canada(Ontario) |
Wicander,R. A catalogue and biostratigraphic distribution of North American Devonian acritarchs. |
1983 |
| details |
Early Givetian |
Middle Givetian |
Canada(Ontario) |
Wicander,R. A catalogue and biostratigraphic distribution of North American Devonian acritarchs. |
1983 |
| details |
Late Siegenian |
Middle Givetian |
North America |
Wicander,R. Middle Devonian acritarch biostratigraphy of North America |
1984 |
| details |
Emsian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Ludlovian |
Emsian |
Germany(Saxony) |
Walter,H. et al. Paleozoic microfossils from the northern Margin of the Erzgebir Mountains, (Saxony). |
1998 |
| details |
Late Ludlovian |
Emsian |
Germany(Saxony) |
Walter,H. et al. Paleozoic microfossils from the northern Margin of the Erzgebir Mountains, (Saxony). |
1998 |