| original |
Middle Devonian |
|
Canada |
Deunff,J. A fossil Devonian microplankton of Hystrichospheres from the North American Continent. |
1955 |
| details |
Wenlockian |
|
England(Shropshire) |
Downie,C. Hystrichospheres from the Silurian Wenlock Shale of England. |
1959 |
| details |
Tarannon |
|
Belgium |
Stockmans,F. et al. The Hystrichospheres or rather the acritarchs of the Belgian Silurian. Drilling at the Lust Brewery at Courtrai (Kortrijk). |
1962 |
| original |
Wenlockian |
|
England(Shropshire) |
Downie,C. 'Hystrichosheres', (acritarchs), and spores of the Wenlock Shales, (Silurian), of Wenlock, England. |
1963 |
| original |
Late Ludlovian |
Emsian |
Spain |
Cramer,F.H. Microplankton from three Palaeozoic formations in the Province of Leon, northwest Spain. |
1964 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Devonian |
|
Canada |
Deunff,J. Research on the Devonian microplankton (Acritarchs and Dinophyceae). |
1965 |
| details |
Late Wenlockian |
Early Gedinnian |
Spain |
Cramer,F.H. Palynology of Silurian and Devonian rocks in northwest Spain. |
1966 |
| details |
Llandoverian |
|
Belgium |
Martin,F. Acritarchs from the drilling at the Lust Brewery near Kortrijk (Courtrai) (Belgian Silurian). |
1966 |
| details |
Tarannon |
Early Wenlockian |
Belgium |
Martin,F. Acritarchs from the Park at Neuville-Sous-Huy (Belgian Silurian) |
1966 |
| details |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Palaeozoic microplankton from central Bohemia. |
1966 |
| details |
Early Ludlovian |
|
Nd |
Lister,T.R. et al. New evidence for the age of the primitive Echinoid Myriastiches gigas |
1967 |
| details |
Middle Frasnian |
|
Belgium |
Dricot,E.M. Evolution and paleogeographic distribution of microplankton (Acritarchs) in the Frasnian of Belgium. |
1967 |
| details |
Devonian |
|
Canada |
Deunff,J. Research on Devonian microplankton (acritarchs and dinoflagellates). |
1967 |
| details |
Devonian |
|
USA |
Deunff,J. Research on Devonian microplankton (acritarchs and dinoflagellates). |
1967 |
| details |
Devonian |
|
France |
Deunff,J. Research on Devonian microplankton (acritarchs and dinoflagellates). |
1967 |
| details |
Devonian |
|
Tunisia |
Deunff,J. Research on Devonian microplankton (acritarchs and dinoflagellates). |
1967 |