''Dufrenoyia'' is an extinct genus of

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

ammonites Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttl ...

included in the family Parahoplitidae. These fast-moving nektonic carnivores lived in the

period ( Aptian age).Sepkoski, Jac
Sepkoski's Online Genus Database – Cephalopoda
/ref> The type species of the genus is ''Ammonites dufrenoyi''.

Species

* ''Dufrenoyia codazziana'' Karsten, 1886 * ''Dufrenoyia dufrenoyi'' d'Orbigny, 1840 * ''Dufrenoyia furcata'' Sowerby, 1836 * ''Dufrenoyia justinae'' Hill, 1893

Distribution

Fossils of species within this genus have been found in the

sediments of Germany, Mexico, Morocco, Spain, the United Kingdom, United States, Colombia and Venezuela.

References

* Arkell ''et al.'', 1957. Mesozoic Ammonoidea.

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...

, Part L Ammonoidea. Geological Soc of America and University of Kansas press. Ammonitida genera Ancyloceratina Cretaceous ammonites Early Cretaceous ammonites of North America {{ammonitida-stub