Kossmaticeras is an extinct ammonoid genus belonging to the desmoceratacean family Kossmaticeratidae. Species in this genus were fast-moving nektonic carnivores.[1] They lived during the Late Cretaceous, from upper Turonian to upper Maastrichtian age.[2] The type species of the genus is Ammonites theobaldianus.[1]
Fossils of species within this genus have been found in the Cretaceous sediments of Antarctica, Australia, Canada, Chile, India, Madagascar, New Zealand and South Africa.