| original |
Arenigian |
|
Czechoslovakia |
VavrdovЎ,M. Acritarchs from Klabava Shales (Arenig). |
1972 |
| details |
Llanvirnian |
|
Belgium |
Martin,F. Cambrian-Ordovician acritarchs of the Massif du Brabant, Belgium. |
1975 |
| details |
Arenigian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Nd |
|
Nd |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |
| details |
Nd |
|
Nd |
Servais,T. The Ordovician Arkonia-Striatotheca acritarch Plexus |
1997 |