| details |
Devonian |
|
England |
Deflandre,G. Systematics of the Hystrichospheres: With the acceptance of the Cymatiosphaera O.Wetzel. |
1954 |
| details |
Middle Cambrian |
|
Czechoslovakia |
Slavikova,K. New finds of acritarchs in the Middle Cambrian of the Barrandian, (Czechoslovakia). |
1968 |
| details |
Devonian |
|
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 |