| link
|
From
|
To
|
Geolocation
|
Author - title
|
Year
|
|---|---|---|---|---|---|
| details | Arenigian | Llandeilian | Belgium | Colbath,G.K. The Lower Paleozoic organic-walled phytoplankton (Acritarch) genus Frankea Burmann,1970 | 1986 |
| 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 |