| original |
Early Ordovician |
|
China(Kirin) |
Yin,L.-M. Acritarchs. (In: Study on Cambrian-Ordovician boundary strata and its biota in Dayangcha, Hunjiang, Jilin, China. J.-Y. Chen, editors) |
1985 |
| details |
Early Ordovician |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Ordovician |
|
China(Kirin) |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |