| original |
Middle Ordovician |
|
Finland |
Tynni,R. On Paleozoic microfossils in clastic dykes on the …land Islands and in the core samples of Lumparn. (In: Paleozoic sediments in the Rapakivi area of the …land Islands. L. Bergman, R. Tynni and B. Winterhalter, editors.) |
1982 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Ordovician |
|
Nd |
Servais,T. An annotated bibliographical review of Ordovician acritarchs |
1997 |
| details |
Middle Ordovician |
|
Finland |
Uutela,A. et al. The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy. |
2000 |
| details |
Middle Ordovician |
|
Finland |
Uutela,A. et al. The Ordovician acritarch genera Tranvikium and Ampullula their relationship and taxonomy. |
2000 |