Lytoceras

{{Short description|Genus of molluscs (fossil)}}

{{Automatic taxobox

| fossil_range = {{fossil range|Sinemurian|Cenomanian|ref={{cite journal|last=Sepkoski |first=Jack |title=A compendium of fossil marine animal genera (Cephalopoda entry) | journal=Bulletins of American Paleontology |volume=363 |pages=1–560 | year=2002 | url=http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=231&rank=class |accessdate=2017-10-18 |url-status=dead | archiveurl=https://web.archive.org/web/20080507014300/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=231&rank=class | archivedate=2008-05-07 }}}}

| image = Lytoceras fimbriatum.JPG

| image_caption = Lytoceras fimbriatum

| taxon = Lytoceras

| authority = Suess, 1865

| subdivision_ranks = Species

| subdivision_ref = [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=15143 Paleobiology Database - Lytoceras]. 2017-10-19.

|subdivision =

• Lytoceras aulaeum Anderson, 1938
• Lytoceras baconicum Vadasz, 1910
• Lytoceras batesi Whiteaves, 1884
• Lytoceras belliseptatiforme Collignon, 1962
• Lytoceras cornucopia Young and Bird, 1822
• Lytoceras crenatum Buckman, 1926
• Lytoceras eudesianum (Orbigny, 1845)
• Lytoceras fimbriatoides Gemmellaro, 1884
• Lytoceras fimbriatum Sowerby, 1817
• Lytoceras fraasi Dacqué, 1910
• Lytoceras francisci Oppel, 1865
• Lytoceras fuggeri Geyer, 1893
• Lytoceras furcicrenatum Buckman, 1928
• Lytoceras juillieti (Orbigny, 1841)
• Lytoceras ovimontanum Geyer, 1893
• Lytoceras polycyclum Neumayr, 1873
• Lytoceras polyanchomenum (Gemellaro, 1872)
• Lytoceras praesublineatum Fucini, 1899
• Lytoceras richei Sayn, 1901
• Lytoceras saturnale Anderson, 1938
• Lytoceras sepositum Meneghini, 1875
• Lytoceras subfimbriatoides Hoedemaeker in Hoedemaeker et al., 2016
• Lytoceras subfimbriatum (Orbigny, 1841)
• Lytoceras sutile Oppel, 1868
• Lytoceras trompianum Hauer, 1861
• Lytoceras villae Meneghini, 1874

}}

Lytoceras is an ammonite genus that was extant during most of the Jurassic and Cretaceous periods, and is the type genus for the family Lytoceratidae. These cephalopods were fast-moving nektonic carnivores.