| details |
Carboniferous |
Permian |
USSR(Ukrainian SSR) |
Medvedeva,A.M. Palynological investigation of Petroleum |
1978 |
| details |
|
|
North America |
Cramer,F.H. Middle Silurian continental movement estimated from phytoplankton-facies transgressions. |
1970 |
| details |
|
|
Brazil |
Cramer,F.H. Middle Silurian continental movement estimated from phytoplankton-facies transgressions. |
1970 |
| 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 |
Eisenack,A. The microfauna of the Ostseekalke. 1. Chitinozoa, Hystrichosphaeres. |
1965 |
| details |
Llanvirnian |
Caradocian |
England(Shropshire) |
Jenkins,W.A.M. Ordovician chitinozoa from Shropshire. |
1967 |
| details |
Early Devonian |
|
Canada(Ontario) |
Deunff,J. On a microplankton from the Devonian of Canada containing some new types of Hystrichosphaerids. |
1954 |
| details |
Silurian |
|
Nd |
Deflandre,G. Groups Incertae Sedis.Hystrichospheres. chitinozoans. |
1952 |
| details |
Nd |
|
Nd |
M¤dler,K.A. Hystrichophyta and acritarchs |
1967 |
| details |
Ordovician |
|
Romania |
Beju,D. The present stage of the palynological researches concerning the Antecretaceous of Romania. |
1971 |
| details |
Early Llandeilian |
|
Czechoslovakia |
VavrdovЎ,M. Palaeozoic microplankton from central Bohemia. |
1966 |
| details |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Ordovician acritarchs from Central Bohemia. |
1965 |
| details |
Early Tremadocian |
|
USSR(Estonian SSR) |
Yankauskas,T.V. et al. Micropaleontological characteristics of the Tremadocian Ulgase Member of Estonia. |
1972 |
| details |
Late Cambrian |
Early Permian |
Nd |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Late Cambrian |
Early Permian |
England |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Nd |
|
Nd |
Loeblich,A.R.,Jr. Protistan phylogeny as indicated by the fossil record. |
1974 |