| details |
Nd |
|
Nd |
Servais,T. et al. A discussion and proposals concerning the Lower Paleozoic "Galeate" acritarch Plexus |
1995 |
| details |
Ordovician |
|
Nd |
Servais,T. An annotated bibliographical review of Ordovician acritarchs |
1997 |
| details |
Nd |
|
Nd |
Rudavskaya,V.A. Systematic principles of sphaeromorphs. (In:Mikrofitofossilii Proterozoya i Rannego Paleozoya SSSR. B.V.Timofeev, editor) |
1974 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Wenlockian |
|
USSR(Buryat ASSR) |
Butov,Y.P. Certain problems of Pre-Mesozoic stratigraphy of the Sayan-Baikal Mountain Area. 1: Crysis of traditional stratigraphy. |
1985 |