| details |
Nd |
|
Nd |
Deflandre,G. et al. Nomenclature and systematics of Hystrichospheres (Sens.Lat.) observations and recitifications. |
1961 |
| details |
Early Ordovician |
|
USSR(Pre-Baltic) |
Timofeev,B.V. Ancient flora of the Prebaltic Region and its stratigraphic significance |
1959 |
| details |
Tremadocian |
|
England(Shropshire) |
Downie,C. An assemblage of microplankton from the Shineton Shale (Tremadocian) |
1958 |
| original |
Tremadocian |
|
England(Shropshire) |
Downie,C. An assemblage of microplankton from the Shineton Shale (Tremadocian) |
1958 |
| details |
Ordovician |
|
USSR |
Timofeev,B.V. Hystrichosphaeridae of the Cambrian |
1956 |
| details |
Middle Devonian |
|
W.Germany(Bavaria) |
Sannemann,D. Hystrichospheres of the Silurian and Middle Devonian of the Frankenwald and their finestructure |
1955 |
| details |
Oligocene |
|
Germany |
Gocht,H. Hystrichospheres and other microorganisms in Oligocene deposits of North and Central Germany. |
1952 |
| original |
Silurian |
|
USSR(Estonian SSR) |
Eisenack,A. On Hystrichospheres and other microffossils of the Baltic Silurian and Cambrian |
1951 |
| details |
Late Cambrian |
|
USSR(Estonian SSR) |
Eisenack,A. On Hystrichospheres and other microffossils of the Baltic Silurian and Cambrian |
1951 |