Desmocerataceae

Desmocerataceae Temporal range: Valanginian - Maastrichtian
Desmoceras sp. – Lower cretaceous (Albian) from Mahajanga, Madagascar
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Ammonoidea
Order:	Ammonitida
Superfamily:	Desmocerataceae Zittel, 1895
Families
Desmoceratidae Holcodiscidae Kossmaticeratidae Muniericeratidae Pachydiscidae Silesitidae

Desmocerataceae is a superfamily of Cretaceous ammonites, generally with round or oval-whorled shells that are mostly smooth or weakly ribbed and rarely tuberculate, but commonly with constrictions.^{[1] [2]} Regarded as monophyletic, the Desmocerataceae are derived from the Phylloceratidae, spltting off in the Early Cretaceous (Valanginian) and persisting to the end of the Maastrichtian.

References

1. Desmoceratoidea at Paleobiology database, retrieved on July 8, 2012.
2. Wright, C. W. with Callomon, J.H. and Howarth, M.K. (1996), Mollusca 4 Revised , Cretaceous Ammonoidea, vol. 4, in Treatise on Invertebrate Paleontology, Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, 67-111.