Trachyceras

{{Short description|Extinct genus of molluscs}}

{{Use dmy dates|date=April 2022}}

{{Automatic taxobox

| fossil_range = {{fossil range|Carnian|ref={{cite web

| last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database|author-link =| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| accessdate = 28 May 2014 }}}}

| image = Trachyceras fossil at NMMNHS.jpg

| image_caption = Trachyceras fossil at the New Mexico Museum of Natural History and Science

| taxon = Trachyceras

| authority = Laube 1869

| subdivision_ranks = Species

| subdivision_ref = [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=100981 Paleobiology Database - Austrotrachyceras]. 29 May 2014.

| subdivision =

}}

Trachyceras is a genus of ammonoid cephalopods belonging to the order Ceratitida. The type species is Trachyceras aon, which was first described by Georg zu Münster in 1834 as a species of Ceratites. The genus includes many species found in Afghanistan, Bosnia and Herzegovina, Canada, China, Germany, Hungary, India, Indonesia, Italy, the Russian Federation, Slovenia, and the United States.

The family to which Trachyceras belongs, the Trachyceratidae, has more or less involute, highly ornamented shells and ceratitic to ammonitic sutures.