| original |
Middle Ordovician |
|
USSR(Estonian SSR) |
Eisenack,A. Chitinozoa of the Baltic Region. |
1968 |
| details |
Ludlovian |
|
Canada(NWT) |
Jansonius,J. Classification and stratigraphic application of chitinozoa. |
1970 |
| details |
Llandeilian |
|
Nd |
Combaz,A. Stratigraphy of the chitinozoans. |
1972 |
| details |
Nd |
|
Nd |
Taugourdeau,P. Several systematic attributes proposed for chitinozoa. |
1981 |
| details |
Tremadocian |
Middle Caradocian |
USSR(Estonian SSR) |
Grahn,Y. Ordovician chitinozoa from Tallinn, Northern Estonia. |
1984 |
| details |
Middle Ordovician |
Silurian |
Nd |
Miller,M.A. et al. A potential morphologic Lineage for Bilayered Desmochitinid chitinozoans |
1987 |
| details |
Nd |
|
Nd |
Miller,M.A. Chitinozoa. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Nd |
|
Nd |
Paris,F. et al. A revised chitinozoan classification |
1999 |