Euarchontoglires (from: Euarchonta ("true rulers") + Glires ("dormice")), synonymous with Supraprimates, is a clade and a superorder of placental mammals, the living members of which belong to one of the five following groups: rodents, lagomorphs, treeshrews, primates, and colugos.

Relations among the four cohorts (Euarchontoglires, Xenarthra, Laurasiatheria, Afrotheria) and the identity of the placental root remain controversial.

[citation needed] Although both Euarchontoglires and diprotodont marsupials are documented to possess a vermiform appendix, this feature evolved as a result of convergent evolution.

[6] Euarchontoglires probably split from the Boreoeutheria magnorder about 85 to 95 million years ago, during the Cretaceous, and developed in the Laurasian island group that would later become Europe.

[citation needed] The hypothesized relationship among the Euarchontoglires is as follows:[8] Laurasiatheria Lagomorpha (rabbits, hares, pikas) Rodentia (rodents) Scandentia (treeshrews or banxrings) Dermoptera (colugos) Primates One study based on DNA analysis suggests that Scandentia and Primates are sister clades, but does not discuss the position of Dermoptera.