| details |
Ashgillian |
Llandoverian |
USA(Eastern) |
Colbath,G.K. Abrupt terminal Ordovician extinction in phytoplankton associations, Southern Appalachians. |
1986 |
| details |
Ordovician |
Tertiary |
USA |
Lindgren,S. Remarks on the taxonomy, botanical affinities, and distribution of Leiospheres. |
1981 |
| details |
Early Gothlandian |
|
Tennessee |
Wood,G.D. Biostratigraphic and paleoecologic significance of acritarchs from the Waldron Formation, (Lower Silurian), midcontinent, United States |
1984 |
| details |
Gedinnian |
|
Tennessee |
Wood,G.D. et al. Early Devonian, (Gedinnian), organic-walled microphytoplankton and spores from the Ross Formation of Tennessee, United States. |
1985 |
| details |
Ordovician |
Cretaceous |
Sweden |
Lindgren,S. Remarks on the taxonomy, botanical affinities, and distribution of Leiospheres. |
1981 |
| details |
Ordovician |
Silurian |
Sweden |
Kjellstrжm,G. Remarks on the Chemistry and ultrastructure of the Cell wall of some Palaeozoic Leispheres |
1968 |
| details |
Vendian |
|
Spitsbergen |
Steiner,M. Chuaria circularis Walcott 1899; "megasphaeromorph acritarch" or prokaryotic colony? |
1996 |
| details |
Early Wenlockian |
|
Scotland(Berwick) |
Molyneux,S.G. Probable Early Wenlock acritarchs from the Linkim Beds of the Southern Uplands |
1987 |
| details |
Late Llandeilian |
Early Wenlockian |
S.Ireland(Galway) |
Emo,G.T. et al. Palynological evidence for the age of the Lower Palaeozoic rocks of Slieve Aughty, Counties Clare and Galway. |
1978 |
| details |
Late Llandeilian |
Early Wenlockian |
S.Ireland(Clare) |
Emo,G.T. et al. Palynological evidence for the age of the Lower Palaeozoic rocks of Slieve Aughty, Counties Clare and Galway. |
1978 |
| details |
Vendian |
|
Russia(Yakutia) |
Steiner,M. Chuaria circularis Walcott 1899; "megasphaeromorph acritarch" or prokaryotic colony? |
1996 |
| details |
Riphean |
|
Russia(Urals) |
Veis,A.F. et al. Age transformation in the facies-ecological structure of Precambrian biotas and stratigraphy of the Riphean. |
1998 |
| details |
Riphean |
|
Russia(Siberia) |
Veis,A.F. et al. Age transformation in the facies-ecological structure of Precambrian biotas and stratigraphy of the Riphean. |
1998 |
| details |
Vendian |
|
Russia(Siberia) |
Steiner,M. Chuaria circularis Walcott 1899; "megasphaeromorph acritarch" or prokaryotic colony? |
1996 |
| details |
Jurassic |
|
Romania |
Lindgren,S. Remarks on the taxonomy, botanical affinities, and distribution of Leiospheres. |
1981 |
| details |
Berriasian |
Valanginian |
Romania |
Luta,S. Mesozoic sporo-pollen association in the drillings at Sirinia (Banat). |
1968 |
| details |
Middle Devonian |
Late Devonian |
Romania |
Beju,D. New palynological facts concerning the Paleozoic of the Moesian Platform (Preliminary Note) |
1964 |