Polyptychoceras is an extinct genus of ammonites from the Late Cretaceous of Asia, Europe, and North[2] and South America.

[4] The soft body of the animal would have to have been large, in order to keep the falling shaft off of the ground.

[5] A Japanese study in 1979 suggested that Polyptychoceras lived and travelled in schools, similarly to modern cuttlefish.

[3] Individual fossil specimens of a particular species of Polyptychoceras are frequently found in sediments laid down in the same bed of water, around the Santonian and Upper Coniacian faunal stages of the Late Cretaceous Epoch.

[3] Fossils of Polyptychoceras have been found in Angola, Antarctica, Argentina, Austria, Japan, Mexico, the Russian Federation, and the United States (California).