| details |
Late Riphean |
|
USSR(Siberia) |
Pyatiletov,V.G. Resolutions of the All-Union Collequim on plant microfossils, (acritarchs), of Interior, (oil and gas bearing), Regions of the Siberian Platform. |
1986 |
| details |
Vendian |
|
USSR(Ukrainian SSR) |
Hofmann,H.J. Paleoscene #7 -Precambrian biostratigraphy |
1987 |
| details |
Riphean |
Vendian |
USSR(Siberia) |
Veis,A.F. Riphean and Vendian microfossils of the Ushur-Maya and Turukhan Regions of Siberia |
1988 |
| details |
Precambriam |
|
USSR |
Yankauskas,T.V. et al. Acritarch (Group acritarch,1963) classification. (In: Precambrian Microfossils of the USSR. T.V.Yankauskas, editor) |
1989 |
| details |
Late Proterozoic |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Middle Proterozoic |
|
China(Hopei) |
Yan,Y.-Z. Shale-Facies microflora from the Changzhougou Formation (Changcheng System) in Pangjiabu Region, Hebei, China. |
1991 |