Upper Campanian brachiopods from the Mons Basin (Hainaut, Belgium): the brachiopod assemblages from the Belemnitella mucronata Zone

Upper Campanian brachiopods from the top of the "Craie de Trivieres" and from the base of the "Craie d'Obourg" ( Belemnitella mucronata Zone) collected in Cuesmes (Mons Basin, Hainaut, Belgium) were studied for their palaeoecological significance. A stratigraphical correlation with the micromorphic brachiopod Zone ( tenuicostata - longicollia Zone) described by SURLYK for the white chalk from Northern Europe is observed. A new species of Argyrotheca DALL, 1900 is described.