| original |
Early Gothlandian |
|
USSR(Baltic) |
Eisenack,A. Hystrichospheres and related forms in the Baltic Silurian. |
1938 |
| details |
Late Devonian |
|
Brazil(Goias) |
Sommer,F.W. Devonian microfossils from Aragarcas, Goias. |
1963 |
| details |
Ordovician |
|
W.Germany(Rhineland) |
Eisenack,A. Chitinozoans and Hystrichospheres in the Ordovician of the Rhine Schiefergebirge. |
1939 |
| details |
Ordovician |
|
Czechoslovakia |
Eisenack,A. Microfossils from Flintstones of the Ordovician in Bohemia. |
1948 |
| details |
Ordovician |
|
Czechoslovakia |
Eisenack,A. Microfossils from Flintstones of the Ordovician in Bohemia. |
1948 |
| details |
Middle Clintonian |
Late Clintonian |
New York |
Fisher,J.C. The Hystrichosphaerids in the Clinton Group, (Silurian), of New York State. |
1955 |
| details |
Late Couvinian |
|
France |
Deunff,J. Planktonic microorganisms (Hystrichospheres) in the Devonian of the Armoricain Massif. |
1954 |
| details |
Late Ordovician |
|
Wales |
Lewis,H.P. The microfossils of the Upper Caradocian Phosphate deposits of Montgomeryshire, North Wales |
1940 |
| details |
Early Devonian |
|
Uruguay |
Martinez-Macchiavello,J.C. Some acritarchs from a sample from the Lower Devonian (Cordobes) of Blanquillo, Department of Durazno, Uruguay |
1969 |
| details |
Jurassic |
|
USSR(Ukrainian SSR) |
Isagulova,Y.Z. Hystrichosphaeridaceae in Jurassic sediments in the l'Vov-Volhynia Coal Field. |
1963 |
| details |
Silurian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Nd |
|
Nd |
PŠ¶the de Baldis,E.D. Wenlockian microplankton from the Argentinian Precordillera. |
1975 |
| details |
Late Devonian |
|
Canada(Alberta) |
Staplin,F.L. Micropaleontology and mineralogy of Devonian Reefal Strata, Alberta. |
1956 |
| details |
Middle Devonian |
Early Mississippian |
Ohio |
Winslow,M.R. Plant spores and other microfossils from Upper Devonian and Lower Mississippian rocks of Ohio |
1962 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Givetian |
|
Ohio |
Wicander,R. et al. Systematics and biostratigraphy of the organic-walled microphytoplankton from the Middle Devonian, (Givetian), Silica Formation, Ohio, USA. |
1981 |
| details |
Frasnian |
|
Canada(Alberta) |
Wicander,R. A catalogue and biostratigraphic distribution of North American Devonian acritarchs. |
1983 |