| details |
Llanvirnian |
|
Canada(Quebec) |
Achab,A. Succession of chitinozoan assemblage from the Middle Ordovician of Quebec and eastern Canada |
1986 |
| details |
Pushgillian |
Rawtheyan |
Worldwide |
Grahn,Y. Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Late Ashgillian |
|
Canada(Quebec) |
Grahn,Y. Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Ashgillian |
|
China(Kweichow) |
Qian,Z.-S. et al. Chitinozoans from the Wufeng Formation, (Ashgillian), of the Yangzi Region |
1989 |