Publications

Four chitinozoan microfaunas are described from the upper part of the Chaleurs Group in the northeastern Gaspé Peninsula. The lowest assemblage is from the Roncelles Formation and is mainly composed of damaged forms of Ancyrochitina and Angochitina. Each of the three succeeding members of the Indian Point Formation is characterized by a distinctive assemblage. The association of Musaechitina aff. M. nusasao and Urochitina urna in the Rosebush Cove Member suggests a Pridoli (late Silurian) age. The succeeding Petit Portage Member yields another typical Pridoli assemblage, characterized by Linochitina klonkensis and U. urna. A Lochkovian (Lower Devonian) chitinozoan microfauna is recognized in the lower part of the Quai Rock Member, diagnostic species being Ancyrochitina chlupaci, Eisenackitina humei and Margachitina catenaria catenaria. Similarities between upper Silurian and Lower Devonian assemblages from eastern Canada, south-west Europe and North Africa indicate a decrease of the strong differentiation that prevailed during Ordovician and early Silurian times between Laurentian and north Gondwanan chitinozoan microfaunas.