Kosmoceratidae

Extinct family of ammonites

Kosmoceratidae Temporal range: Middle Jurassic PreꞒ Ꞓ O S D C P T J K Pg N

Fossil shell of Kosmoceras spinosum from Calvados (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Superfamily:	†Stephanoceratoidea
Family:	†Kosmoceratidae Haug, 1887
Species^[1]
Gulielmites Kepplerites Kosmoceras Sigaloceras

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.^[2]

References

^ "Paleobiology Database - Kosmoceratidae". Retrieved 2017-10-19.
^ Treatise on invertebrate paleontology. Part F : America / edited by Raymond C. Moore. -- University of Kansas Press, 1956

Philippe Courville, Catherine Crônier - Diversity or Disparity in the Jurassic (Upper Callovian) genus Kosmoceras (ammonitina): A Morphometric Approach