| original |
Early Jurassic |
|
Canada(W.Canada) |
Pocock,S.A.J. Palynology of the Jurassic sediments of western Canada. Part 2. Marine species. |
1972 |
| details |
Toarcian |
|
Canada(Alberta) |
Pocock,S.A.J. Dating and correlation of the Jurassic strata of western Canada by means of plant microfossils. |
1972 |
| details |
Late Sinemurian |
Toarcian |
Canada(British Columbia) |
Pocock,S.A.J. Dating and correlation of the Jurassic strata of western Canada by means of plant microfossils. (In: Report of Activities of the CSPG Paleontology Division 1975/1976) |
1977 |
| details |
Jurassic |
|
Canada |
Lindgren,S. Taxonomic review of Leiosphaeridia from the Mesozoic and Tertiary |
1982 |
| details |
Early Cretaceous |
|
Germany |
Lindgren,S. Taxonomic review of Leiosphaeridia from the Mesozoic and Tertiary |
1982 |
| details |
Jurassic |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Sinemurian |
|
North America |
Smith,P.L. et al. North America |
1994 |