| original |
Early Gothlandian |
|
USSR(Yaroslav) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Late Ordovician |
Early Gothlandian |
India(Karnataka) |
Viswanathiah,M.N. et al. Acritarchs and associated microplankton from the Katageri Formation of the Badami Group, South India. |
1984 |
| details |
Precambriam |
|
India(Andhra Pradesh) |
Viswanathiah,M.N. et al. Microfossils from the Gandikota Quartzites of the Chatravati Group, Cuddapah Supergroup, Andhra Pradesh |
1984 |
| details |
Early Gothlandian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |