Haploceras

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

{{Automatic taxobox

| fossil_range = {{fossil range|Kimmeridgian|Tithonian|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 |access-date=2017-10-18 |url-status=dead | archive-url=https://web.archive.org/web/20080507014300/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=231&rank=class | archive-date=2008-05-07 }}}}

| taxon = Haploceras

| authority = Zittel, 1870

| subdivision_ranks = Species

| subdivision = See text

}}

Haploceras is a genus of late Upper Jurassic (Kimmeridgian and Tithonian) ammonoid cephalopods and the type for the Haploceratidae, similar to Lissoceras but with a broader whorl section and small blunt lappets and a blunt rostrum; some species with feeble ventral folds on body chamber.