| details |
Frasnian |
|
Belgium |
Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. |
1973 |
| details |
Frasnian |
|
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. |
1974 |
| details |
Early Devonian |
|
USSR(Siberia) |
Sheshegova,L.I. Description of organic material; Acritarcha Group. (In: Paleozoic of the Southeast of the Western Siberian Platform. A.V.Kanygin, editor) |
1984 |
| details |
Frasnian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |