The fossil for today is Leymeriella regularis from the Albian stage (Jurassic) rocks near Bellegarde sur Valserine, Ain Department, France. The whorls are not overly wide but do cover approximately 90% of the previous generation. Moderate ribbing marks the sides of the whorls but does not continue completely across the keel of the shell. The cross section of the living chamber is square in shape.
Thanks to Gery for the specimens!