Ptycholytoceras

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

{{Automatic taxobox

| fossil_range = {{fossil range|Toarcian|ref=}}

| image =

| taxon = Ptycholytoceras

| authority = Spath, 1927

| subdivision_ranks = Species

| subdivision = See text

}}

Ptycholytoceras is a genus of fast-moving nektonic ammonoid carnivores{{cite web | title= Paleobiology Database| year = | url = https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=15555 | access-date = 2014-05-28 }} included in the Lytoceratinae in which the shell has round inner and depressed outer whorls and sides with dorso-ventrally sloping folds that do not pass onto the venter (outer rim).

The type species Phycholyioceras humile (Prinz), named by Spath, 1924, first described as Lytoceras humile by Prinz in 1904, came from the Lower Jurassic (Toarcian){{cite web

| last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| accessdate = 2014-05-28 }} of Hungary.