| original |
Ordovician |
|
France(Finistere) |
Deunff,J. Veryhachium, new genus of Paleozoic hystrichospheres. |
1954 |
| original |
Late Ordovician |
|
USSR(Siberia) |
Timofeev,B.V. Ordovician and Silurian phytoplankton of the Siberian Platform. |
1963 |
| original |
Early Devonian |
|
Canada(Ontario) |
Deunff,J. On a microplankton from the Devonian of Canada containing some new types of Hystrichosphaerids. |
1954 |
| details |
Nd |
|
Nd |
Deflandre,G. et al. Notes on the acritarchs. |
1963 |
| details |
Llanvirnian |
Caradocian |
England(Shropshire) |
Jenkins,W.A.M. Ordovician chitinozoa from Shropshire. |
1967 |
| details |
Silurian |
|
Ohio |
Gray,J. et al. Palynological evidence bearing on the Ordovician Silurian Paraconformity in Ohio |
1972 |
| details |
Frasnian |
|
France(Ille-et-Vilaine) |
Babin,C. et al. The discovery of Upper Devonian in the Nenez Belair Synclinorium, (Breton Massif). Paleogeographic implications. |
1973 |
| details |
Nd |
|
Nd |
Deflandre,G. et al. Critical remarks on the genus Micrhystridium, Deflandre. |
1965 |
| details |
Ludlovian |
Gedinnian |
Algeria |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |
| details |
Permian |
|
Nd |
Rudavskaya,V.A. Palaeozoic Hystrichospheres. |
1969 |
| details |
Carboniferous |
|
Nd |
Rudavskaya,V.A. Palaeozoic Hystrichospheres. |
1969 |
| details |
Middle Cambrian |
|
Baltic |
Rudavskaya,V.A. Palaeozoic Hystrichospheres. |
1969 |
| details |
Givetian |
|
Czechoslovakia |
Lele,K.M. Observations on Middle Devonian microfossils from the Barrandian Basin, Czechoslovakia. |
1972 |
| details |
Eifelian |
|
Czechoslovakia |
Lele,K.M. Observations on Middle Devonian microfossils from the Barrandian Basin, Czechoslovakia. |
1972 |
| details |
Nd |
|
Nd |
Sarjeant,W.A.S. The Hystrichospheres. A review and discussion. |
1961 |
| details |
Late Ordovician |
Late Gothlandian |
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1971 |
| details |
Nd |
|
Nd |
Brito,I.M. The acritarchs |
1967 |