It looks very much like specimens I once collected from the Ammonitico rosso in the Apennines, Italy. I'm sure there is a lot of literature on the ammonites from there.
Thank you Ahmad S. Yasien Al-Gurairy , Robert P. Speijer and Christian Neumann for your response. Could you recommend me any specific literature about Phylloceratid suture patterns in order to further identify this specimen?