Assemblages de chitinozoaires dans l'Ordovicien inférieur de l'est du Canada

From a description of middle Arenig Chitinozoa from the Levis Formation (Zone C) and the Cow Head Group, a succession of the main Lower Ordovician chitinozoan assemblages is proposed. This succession is compared with the main assemblages described in the literature. This comparison allows recognition of taxa with potential stratigraphic value.