Scylacosauria

{{Short description|Extinct clade of therapsids}}

{{Automatic taxobox

| fossil_range = Middle Permian - Middle Triassic

| image = Porosteognathus1DB.jpg

| image_caption = Life restoration of Porosteognathus efremovi

| taxon = Scylacosauria

| authority = van den Heever, 1994

| subdivision_ranks = Subgroups

| subdivision =

• {{extinct}}Scylacosauridae
• {{extinct}}Eutherocephalia

}}

Scylacosauria is a clade of therocephalian therapsids. It includes the basal family Scylacosauridae and the infraorder Eutherocephalia. Scylacosauridae and Eutherocephalia form this clade to the exclusion of Lycosuchidae, the most basal therocephalian family. Thus, Scylacosauria includes all therocephalians except lycosuchids.{{cite journal |last=Huttenlocker |first=A. |year=2009 |title=An investigation into the cladistic relationships and monophyly of therocephalian therapsids (Amniota: Synapsida) |journal=Zoological Journal of the Linnean Society |volume=157 |issue=4 |pages=865–891 |doi=10.1111/j.1096-3642.2009.00538.x|doi-access=free }} Below is a cladogram showing the phylogenetic position of Scylacosauria:

{{clade| style=font-size:100%;line-height:85%

|label1=Therocephalia

|1={{clade

|1=Lycosuchidae

|label2=Scylacosauria

|2={{clade

|1=Scylacosauridae

|2=Eutherocephalia

}} }} }}