Editing Reptile (section)

===The position of turtles===
The placement of turtles has historically been highly variable. Classically, turtles were considered to be related to the primitive anapsid reptiles.<ref name="Romer, A 1977"/> Molecular work has usually placed turtles within the diapsids. As of 2013, three turtle genomes have been sequenced.<ref name=Gilbert2013>{{cite journal | last1=Gilbert | first1=S.F. | last2=Corfe | first2=I. | date=May 2013 | title=Turtle origins: picking up speed | journal=Dev. Cell | volume=25 | issue=4 | pages=326–328 | doi=10.1016/j.devcel.2013.05.011 |doi-access=free | pmid=23725759 | url=http://www.cell.com/developmental-cell/pdf/S1534-5807(13)00285-2.pdf}}</ref>{{update needed|date=July 2024}} The results place turtles as a [[sister clade]] to the [[archosaur]]s, the group that includes crocodiles, non-avian dinosaurs, and birds.<ref>{{cite journal |first1=Ylenia |last1=Chiari |first2=Vincent |last2=Cahais |first3=Nicolas |last3=Galtier |first4=Frédéric |last4=Delsuc |year=2012 |title=Phylogenomic analyses support the position of turtles as the sister group of birds and crocodiles (Archosauria) |journal=BMC Biology |volume=10 |issue=65 |pages=65 |doi=10.1186/1741-7007-10-65 |pmid = 22839781|pmc=3473239 |doi-access=free}}</ref> However, in their comparative analysis of the timing of [[organogenesis]], Werneburg and Sánchez-Villagra (2009) found support for the hypothesis that turtles belong to a separate clade within [[Sauropsida]], outside the [[sauria]]n clade altogether.<ref name="Werneburg and Sánchez-Villagra 2009">{{cite journal |last1=Werneburg |first1=Ingmar |last2=Sánchez-Villagra |first2=Marcelo R. |date=23 April 2009 |title=Timing of organogenesis support[s] basal position of turtles in the amniote tree of life |journal=BMC Evolutionary Biology |volume=9 |issue=1 |page=82 |id=article&nbsp;82 |doi=10.1186/1471-2148-9-82 |pmid=19389226 |pmc=2679012 |bibcode=2009BMCEE...9...82W |issn=2730-7182 |doi-access=free }}</ref>