Chitinozoaires Ashgilliens de l'Anti-Atlas (Maroc)

Thirty-three species of Chitinozoans are recorded in the Upper Ktaoua and in the Lower Deuxième Bani Formations (Anti-Atlas, Morocco). These two lithological units have been referred to the upper part of the Ashgill Series based on Trilobite, Brachiopod, and Echinoderm evidence. This age assignment is well supported by the present study of the Chitinozoans.

Strong affinities with North American Chitinozoan assemblages (Anticosti Island, Québec; Oklahoma, U.S.A.) are pointed out. The Upper Ktaoua Formation can be correlated with part of the Vaureal Formation (Richmondian of Quebec); the Lower Deuxième Bani Formation seems to be of the same age as the lower part of the Ellis-Bay Formation (Gamachian of Quebec).