Chalard, 1960, p.273: Horizon à Reticuloceras gr. nodosum. With Reticuloceras cf.nodosum, R. nodosum, R. cf moorei, R.                 adpressum, R. stubblefieldi. Fosse Vicoigne, Fosse Heurteau, Sondage Chapelle-Bohain, Fosse Sabatier