Douvilleceras ammonites are commonly found in marine sediments and are known for their distinctive shell morphology. These ammonites typically have a compressed, discoidal shape and a prominent keel running along the outer edge of the shell. The shell of Douvilleceras is typically ornamented with ribs or ridges, which can vary in their spacing and thickness depending on the species.
 
The genus Douvilleceras has a wide geographic distribution and has been found in various parts of the world, including Europe, Africa, and North America. These ammonites were likely active swimmers, occupying different ecological niches within ancient marine ecosystems.