| original |
Wenlockian |
|
England(Shropshire) |
Downie,C. 'Hystrichosheres', (acritarchs), and spores of the Wenlock Shales, (Silurian), of Wenlock, England. |
1963 |
| original |
Early Ordovician |
|
Sweden |
Eisenack,A. New types of Baltic Silurian Hystrichospheres and new species. |
1959 |
| original |
Silurian |
|
Sweden |
Eisenack,A. New types of Baltic Silurian Hystrichospheres and new species. |
1959 |
| original |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| original |
Wenlockian |
|
England(Shropshire) |
Downie,C. 'Hystrichosheres', (acritarchs), and spores of the Wenlock Shales, (Silurian), of Wenlock, England. |
1963 |
| original |
Late Costonian |
Onnian |
England(Shropshire) |
Turner,R.E. Acritarchs from the type area of the Ordovician Caradoc Series, Shropshire, England. |
1984 |
| original |
Late Ordovician |
|
Sweden |
Eiserhardt,K.H. Baltisphaerid of the –jlemyrflint of Gotland, Sweden (Acritarchs of the Upper Ordovician boulders). |
1989 |
| original |
Late Ordovician |
|
Sweden |
Eiserhardt,K.H. Baltisphaerid of the –jlemyrflint of Gotland, Sweden (Acritarchs of the Upper Ordovician boulders). |
1989 |
| original |
Early Ordovician |
|
China(Hopei) |
Li,Z.P. Acritarchs from the Upper Machiakou Formation of North China and its geological age. |
1982 |
| original |
Early Caradocian |
|
Sweden |
Eisenack,A. New types of Baltic Silurian Hystrichospheres and new species. |
1959 |
| details |
Wenlockian |
|
Canada(Ontario) |
Thusu,B. Acritarchs of the Middle Silurian Rochester Formation of Southern Ontario |
1973 |
| details |
Nd |
|
Nd |
Dufka,P. Acritarchs of the monograptus Sedgwickii Zone, (Zelkovice Formation, Llandovery), from Hyskov, Barrandian, Bohemian Massif |
1990 |
| details |
Late Aeronian |
Early Telychian |
Czechoslovakia |
Dufka,P. Acritarchs of the monograptus Sedgwickii Zone, (Zelkovice Formation, Llandovery), from Hyskov, Barrandian, Bohemian Massif |
1990 |
| details |
Early Wenlockian |
|
Sweden |
Le H©riss©,A. Acritarchs and cysts of Prasinophycean algae of the Silurian of Gotland, Sweden. |
1989 |
| details |
Silurian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| details |
Early Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |