Kingdom Animalia Subclass Ammonoidea Superfamily Stephanocerataceae | Class Cephalopoda Order Ammonitida | |
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Family Kosmoceratidae
Haug 1887 | ||
Kosmoceratidae is an extinct ammonite family from the Callovian (Middle Jurassic) to Early Cretaceous.
Kosmoceratidae are probably the most polymorphic groups of Jurassic ammonites. These ammonoids have a more or less tabulate venter, with lateral or ventrolateral tubercles. The aptychus is double valved with a concentrically ribbed surface.
References
Kosmoceratidae Wikipedia(Text) CC BY-SA