BeloceratidaeBeloceratidae is a family of ammonites included in the order Agoniatitida.These fast-moving nektonic carnivores lived in the Late Devonian period, from 379.5 to 376.1 Ma.GeneraBeloceras Hyatt 1884Eobeloceras Schindewolf 1936Mesobeloceras Glenister 1958Naplesites Yatskov 1990DistributionFossils of species within this genus have been found in the Devonian sediments of Algeria, France, Germany, Morocco, Spain and United States.