| original |
Late Cambrian |
|
England |
Potter,T.L. British Cambrian acritarchs--A preliminary account. |
1974 |
| original |
Late Cambrian |
|
Wales |
Potter,T.L. British Cambrian acritarchs--A preliminary account. |
1974 |
| details |
Tremadocian |
|
Algeria |
Jardin©,S. et al. Stratigraphic distribution of acritarchs in the Palaeozoic of the Algerian Sahara. |
1974 |
| details |
Acadian |
|
Czechoslovakia |
VavrdovЎ,M. Excystment mechanism of Early Paleozoic acritarchs. |
1976 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Middle Cambrian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Late Cambrian |
|
England |
Vanguestaine,M. The Late Cambrian acritarch Cristallinium randomense: morphology, taxonomy and stratigraphical extension |
2002 |