| original |
Early Cambrian |
|
Scotland |
Downie,C. Lower Cambrian acritarchs from Scotland, Norway, Greenland and Canada. |
1982 |
| details |
Nd |
|
Nd |
Downie,C. Lower Cambrian acritarchs from Scotland, Norway, Greenland and Canada. |
1982 |
| details |
Early Cambrian |
|
United Kingdom |
Downie,C. Acritarchs in British stratigraphy |
1984 |
| details |
Early Cambrian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Cambrian |
|
England |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |