| details |
Late Arenigian |
|
Canada(Quebec) |
Achab,A. Chitinozoans of the Upper Arenigian, (Zone D) of the Levis Formation, Quebec, Canada. |
1982 |
| details |
Llanvirnian |
|
Canada(Newfoundland) |
Achab,A. Llanvirnian chitinozoans, (Table Head Formation) of Western Newfoundland, Canada. |
1983 |
| details |
Middle Arenigian |
|
Canada(Quebec) |
Achab,A. Chitinozoa assemblages of the Early Ordovician of eastern Canada. |
1986 |
| details |
Early Llandeilian |
|
Canada(Quebec) |
Achab,A. Succession of chitinozoan assemblage from the Middle Ordovician of Quebec and eastern Canada |
1986 |
| details |
Early Caradocian |
|
Canada(Quebec) |
Achab,A. Succession of chitinozoan assemblage from the Middle Ordovician of Quebec and eastern Canada |
1986 |
| details |
Early Ordovician |
|
Australia |
Achab,A. Provincialism of Ordovician chitinozoans. |
1988 |
| details |
Early Ordovician |
|
Mexico |
Achab,A. Provincialism of Ordovician chitinozoans. |
1988 |
| details |
Early Ordovician |
|
Canada |
Achab,A. Provincialism of Ordovician chitinozoans. |
1988 |
| details |
Arenigian |
Llanvirnian |
Canada(Quebec) |
Achab,A. Ordovician chitinozoan zonation of Quebec and Western Newfoundland. |
1989 |
| details |
Arenigian |
Llanvirnian |
Canada(Newfoundland) |
Achab,A. Ordovician chitinozoan zonation of Quebec and Western Newfoundland. |
1989 |
| details |
Early Ordovician |
|
Worldwide |
Achab,A. Biogeography of Ordovician chitinozoa. (In: Advances in Ordovician Geology. C.R.Barnes and S.H.Williams, editors) |
1991 |
| details |
Ashgillian |
|
Canada(Quebec) |
Achab,A. et al. The Laurentian Ordovician chitinozoan zonation: some modifications and some remaining problems. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |
| details |
Ashgillian |
|
Canada(Arctic) |
Achab,A. et al. The Laurentian Ordovician chitinozoan zonation: some modifications and some remaining problems. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |
| details |
Ashgillian |
|
Canada(Newfoundland) |
Achab,A. et al. The Laurentian Ordovician chitinozoan zonation: some modifications and some remaining problems. (In: Ordovician from the Andes. G.L.Albanesi,M.S.Beresi,S.H.Peralta,editors) |
2003 |
| details |
Llanvirnian |
|
Canada(New Brunswick) |
Asselin,E. et al. Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada. |
2004 |
| details |
Llanvirnian |
|
Canada(Quebec) |
Asselin,E. et al. Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada. |
2004 |