Your ammonite probably is...
Schloenbachia
Suture: Ammonitic
Schloenbachia is identified by its branching radial ribs and simple ammonitic suture lines. It had a prominent keel. Some ammonites in this genus were broad and covered in tubercles, while others were flat and narrow. Schloenbachia was probably a good swimmer. It lived in Late Cretaceous Europe and Greenland and is one of the most common ammonites by far.
"Ernst Haeckel [Public domain], via Wikimedia Commons" https://commons.wikimedia.org/wiki/File%3AHaeckel_Schloenbachia_varians.jpg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/50/Haeckel_Schloenbachia_varians.jpg/512px-Haeckel_Schloenbachia_varians.jpg
