| original |
Ludlovian |
|
USSR(Ukrainian SSR) |
Kiryanov,V.V. Silurian acritarchs of Volhynia and Podolia |
1978 |
| details |
Nd |
|
Nd |
Le H©riss©,A. Acritarchs and cysts of Prasinophycean algae of the Silurian of Gotland, Sweden. |
1989 |
| details |
Ludlovian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Gothlandian |
|
USSR(Ukrainian SSR) |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |