Zygosaurus

{{Short description|Extinct genus of amphibians}}

{{Automatic taxobox

| fossil_range = Middle Permian

| image = Zygosaurus14DB.jpg

| image_caption = Life restoration of Zygosaurus

| taxon = Zygosaurus

| authority = Eichwald, 1848

| type_species = {{extinct}}Zygosaurus lucius

| type_species_authority = Eichwald, 1848

| subdivision_ranks =

| subdivision =

}}

Zygosaurus is an extinct genus of dissorophid temnospondyl from the Middle-Late Permian of Russia. It was described in 1848 by Eduard Eichwald, making it the first dissorophid to be described and is known from a single species, Zygosaurus lucius.{{Cite journal|last=Eichwald|first=Eduard|date=1848|title=Uber die Saurier des kupferfhrenden Zechsteins Russlands|url=https://books.google.com/books?id=dY1fAAAAcAAJ&dq=%3F%C3%BCber+die+Saurier+des+kupfer+f%C3%BChrenden+Zechsteins+Russlands&pg=PT6|journal=Bulletin de la Société Nationale de Moscou|language=ru|volume=21|pages=136–204|via=Google Books}} The location of the holotype, and only known specimen, is unknown,{{Cite journal|last=Schoch|first=Rainer R.|date=2012|title=Character distribution and phylogeny of the dissorophid temnospondyls|url=http://www.foss-rec.net/15/121/2012|journal=Fossil Record|volume=15|issue=2|pages=121–137|doi=10.1002/mmng.201200010|doi-access=free}} and although casts are reposited in several institutions, little is known about this taxon beyond qualitative aspects of the skull (e.g., preorbital length twice as long as postorbital length; skull width greatest at mid-length of orbits).{{Cite book|title=Handbuch der Paläoherpetologie Part 3A2. Temnospondyli.|last1=Schoch|first1=Rainer R.|last2=Milner|first2=Andrew R.|publisher=Verlag Dr. Friedrich Pfeil|year=2014|isbn=9783931516260|editor-last=Sues|editor-first=Hans-Dieter|location=Stuttgart|oclc=580976}} The skull was estimated to be around 20 cm in length, making it one of the largest dissorophids, being only slightly smaller than Kamacops.