| original |
Arenigian |
|
China(Yunnan) |
Yin,L.-M. New forms of acritarch from Early Ordovician sediments in Yichang, Hubei, China. |
1994 |
| details |
Ordovician |
|
Nd |
Servais,T. An annotated bibliographical review of Ordovician acritarchs |
1997 |
| details |
Arenigian |
|
China(Yunnan) |
Uutela,A. et al. The Ordovician acritarch genera Tranvikium and Ampullula: their relationship and taxonomy. |
2000 |
| details |
Early Ordovician |
|
China(Hupei) |
Uutela,A. et al. The Ordovician acritarch genera Tranvikium and Ampullula their relationship and taxonomy. |
2000 |