Kosmoceratidae
| Kosmoceras spinosum Temporal range: Middle Jurassic | |
|---|---|
 | |
| Fossil shell of Kosmoceras spinosum from Calvados (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
| Scientific classification | |
| Kingdom: | Animalia |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Superfamily: | Stephanocerataceae |
| 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. [1]
Genera
- Kosmoceras
- Kepplerites
- Gulielmites
- Sigaloceras
References
- ↑ Treatise on invertebrate paleontology. Part F : America / edited by Raymond C. Moore. -- University of Kansas Press, 1956
- ↑ Mikko's Phylogeny Archive
- Philippe Courville, Catherine Crônier - Diversity or Disparity in the Jurassic (Upper Callovian) genus Kosmoceras (ammonitina): A Morphometric Approach
External links
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