| details |
Middle Cambrian |
|
USSR(Baltic) |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Ordovician |
|
France(Normandie) |
Rauscher,R. et al. Palynologic-Planktonic study in the Sainte-Mere-Eglise Basin (Normandy).1.Acritarchs. |
1968 |
| details |
Tremadocian |
|
USSR(Estonian SSR) |
Yankauskas,T.V. et al. Micropaleontological characteristics of the Tremadocian Ulgase Member of Estonia. |
1972 |
| details |
Nd |
|
Nd |
Rasul,S.M. The Lower Palaeozoic acritarchs Priscogalea and Cymatiogalea |
1974 |
| details |
Early Gothlandian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |