| original |
Late Gothlandian |
|
USSR(Baltic) |
Yankauskas,T.V. et al. Silurian acritarcha from the Baltic Arca |
1972 |
| details |
Llandoverian |
Pridolian |
USSR(Belorussian SSR) |
Piskun,L.V. Veryhachium of the Ordivician and Silurian in the Brestskaya Basin. (In:Mikrofitofossilii Proterozoya i Rannego Paleozoya SSSR. B.V.Timofeev, editor) |
1974 |
| details |
Late Ludlovian |
|
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Wenlockian |
Ludlovian |
USSR(Ukrainian SSR) |
Kiryanov,V.V. Silurian acritarchs of Volhynia and Podolia |
1978 |
| details |
Silurian |
|
USSR(Siberia) |
Tesakov,Y.I. Key Beds of the Kureyka River Region. (In: Silur Sibirskoy Platformy;Opornyve Razezy Severo-Zapada Sibirskoy Platformy. B.S.Sokolov et al, editor) |
1980 |
| details |
Late Gothlandian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Nd |
|
Nd |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |