Your ammonite probably is...
Spiroceras
Suture: Ammonitic
Spiroceras was a loosely coiled ammonite with strong radial ribbing. It was from the Middle Jurassic.
Image by Ghedoghedo, licensed under CC-BY SA 4.0, https://commons.wikimedia.org/wiki/File:Spiroceras_sp_giur_fra.JPG