Quenstedtoceras

Quenstedtoceras (Discovered by Alpheus Hyatt, a American zoologist and palaeontologist in 1877) is a genus of ammonites from Cardioceratidae family, Quenstedtoceratinae subfamily.

Quenstedtoceras were common in the seas of the northern hemisphere at the end of the Middle Jurassic (Late Callovian).