Neoanguimorpha

{{Automatic taxobox

| taxon = Neoanguimorpha

| fossil_range = Albian – Present, {{Fossil range|105|0}}

| image = Kopparorm.JPG

| image_caption = Slowworm (Anguis fragilis)

| image2 = Reticulate Gila Monster.jpg

| image2_caption = Gila Monster (Heloderma suspectum)

| authority = Vidal & Hedges, 2009

| subdivision_ranks = Subclades

| subdivision = *Monstersauria

Diploglossa

}}

Neoanguimorpha is a clade of anguimorphs comprising Monstersauria (represented today by helodermatids) and Diploglossa (Xenosauridae and Anguioidea).{{cite journal |doi=10.1038/nature04328 |pmid=16292255 |title=Early evolution of the venom system in lizards and snakes |journal=Nature |volume=439 |issue=7076 |pages=584–8 |year=2005 |last1=Fry |first1=Bryan G. |last2=Vidal |first2=Nicolas |last3=Norman |first3=Janette A. |last4=Vonk |first4=Freek J. |last5=Scheib |first5=Holger |last6=Ramjan |first6=S. F. Ryan |last7=Kuruppu |first7=Sanjaya |last8=Fung |first8=Kim |last9=Blair Hedges |first9=S. |last10=Richardson |first10=Michael K. |last11=Hodgson |first11=Wayne. C. |last12=Ignjatovic |first12=Vera |last13=Summerhayes |first13=Robyn |last14=Kochva |first14=Elazar |bibcode=2006Natur.439..584F |s2cid=4386245 }}{{cite journal |doi=10.1016/j.crvi.2008.07.010 |pmid=19281946 |title=The molecular evolutionary tree of lizards, snakes, and amphisbaenians |journal=Comptes Rendus Biologies |volume=332 |issue=2–3 |pages=129–39 |year=2009 |last1=Vidal |first1=Nicolas |last2=Hedges |first2=S. Blair |s2cid=23137302 |url=https://comptes-rendus.academie-sciences.fr/biologies/articles/10.1016/j.crvi.2008.07.010/ }}{{cite journal| author1=Pyron | author2=Burbrink | author3=Wiens | year=2013 | title=A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes | journal=BMC Evolutionary Biology | volume=13 | page=93 | doi=10.1186/1471-2148-13-93 | pmid=23627680 | pmc=3682911 | doi-access=free }}{{cite journal|last1=Zheng|first1=Yuchi|last2=Wiens|first2=John J.|title=Combining phylogenomic and supermatrix approaches, and a time-calibrated phylogeny for squamate reptiles (lizards and snakes) based on 52 genes and 4162 species |journal=Molecular Phylogenetics and Evolution |date=2016 |volume= 94|issue= Pt B|pages=537–547 |doi=10.1016/j.ympev.2015.10.009|pmid=26475614}}{{cite journal |doi=10.1098/rsbl.2012.0703 |pmid=22993238 |pmc=3497141 |title=Resolving the phylogeny of lizards and snakes (Squamata) with extensive sampling of genes and species |journal=Biology Letters |volume=8 |issue=6 |pages=1043–6 |year=2012 |last1=Wiens |first1=J. J. |last2=Hutter |first2=C. R. |last3=Mulcahy |first3=D. G. |last4=Noonan |first4=B. P. |last5=Townsend |first5=T. M. |last6=Sites |first6=J. W. |last7=Reeder |first7=T. W. }} Morphological studies in the past had classified helodermatids with the varanoids in the clade Platynota,{{cite journal |last=McDowell |first=S.B. |author2=Bogert, C.M. |year=1954 |title=The systematic position of Lanthanotus and the affinities of the anguinomorphan lizards |journal=Bulletin of the American Museum of Natural History |volume=105 |pages=1–141}}{{cite journal |last=Lee |first=M.S.Y. |year=1997 |title=The phylogeny of varanoid lizards and the affinities of snakes |journal=Philosophical Transactions: Biological Sciences |volume=352 |issue=1349 |pages=53–91 |doi=10.1098/rstb.1997.0005|pmc=1691912 |bibcode=1997RSPTB.352...53L }} while the Chinese crocodile lizard was classified as a xenosaurid.{{Cite journal | last1 = Bhullar | first1 = B. A. S. | title = The Power and Utility of Morphological Characters in Systematics: A Fully Resolved Phylogeny of Xenosaurus and Its Fossil Relatives (Squamata: Anguimorpha) | doi = 10.3099/0027-4100-160.3.65 | journal = Bulletin of the Museum of Comparative Zoology | volume = 160 | issue = 3 | pages = 65–181| year = 2011 | s2cid = 86328454 }} However molecular work found no support in these groupings and instead has found the helodermatids more related to Diploglossa, while the Chinese crocodile lizard and varanoids to form the clade Paleoanguimorpha.