| original |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. New acritarchs from Bohemian Arenig (Ordovician). |
1973 |
| details |
Arenigian |
|
Czechoslovakia |
Loeblich,A.R.,Jr. et al. Some new and revised organic-walled phytoplankton microfossil genera. |
1976 |
| details |
Late Ordovician |
|
Indiana |
Colbath,G.K. Organic-walled microphytoplankton from the Eden Shale, (Upper Ordovician), Indiana, USA. |
1979 |
| details |
Arenigian |
|
Czechoslovakia |
Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Vol.5 Acritarcha. |
1979 |
| details |
Arenigian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |