Euarchontoglires Temporal range:
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From top to bottom (left): rat, treeshrew, colugo; (right) hare, macaque with human. | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Magnorder: | Boreoeutheria |
Superorder: |
Euarchontoglires Murphy et al., 2001 [1] |
Subgroups | |
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Euarchontoglires (from: Euarchonta ("true rulers") + Glires ("dormice")), synonymous with Supraprimates, is a clade and a superorder of mammals, the living members of which belong to one of the five following groups: rodents, lagomorphs, treeshrews, primates, and colugos.
The Euarchontoglires clade is based on DNA sequence analyses and retrotransposon markers that combine the clades Glires (Rodentia + Lagomorpha) and Euarchonta (Scandentia + Primates + Dermoptera). [1] It is usually discussed without a taxonomic rank but has been called a cohort, magnorder, or superorder. Relations among the four cohorts (Euarchontoglires, Xenarthra, Laurasiatheria, Afrotheria) and the identity of the placental root remain controversial. [4] [5]
So far, few, if any, distinctive anatomical features have been recognized that support Euarchontoglires; nor does any strong evidence from anatomy support alternative hypotheses.[ 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] This hypothesis is supported by molecular evidence; so far, the earliest known fossils date to the early Paleocene. [7] The combined clade of Euarchontoglires and Laurasiatheria is recognized as Boreoeutheria.[ citation needed]
The hypothesized relationship among the Euarchontoglires is as follows: [8]
Boreoeutheria |
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One study based on DNA analysis suggests that Scandentia and Primates are sister clades, but does not discuss the position of Dermoptera. [9] Although it is known that Scandentia is one of the most basal Euarchontoglires clades, the exact phylogenetic position is not yet considered resolved, and it may be a sister of Glires, Primatomorpha or Dermoptera or to all other Euarchontoglires. [10] [5] [11] Some old studies place Scandentia as sister of the Glires, invalidating Euarchonta. [12] [13]
Whole-genome duplication may have taken place in the ancestral Euarchontoglires. [14]
Euarchontoglires Temporal range:
| |
---|---|
From top to bottom (left): rat, treeshrew, colugo; (right) hare, macaque with human. | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Magnorder: | Boreoeutheria |
Superorder: |
Euarchontoglires Murphy et al., 2001 [1] |
Subgroups | |
|
Euarchontoglires (from: Euarchonta ("true rulers") + Glires ("dormice")), synonymous with Supraprimates, is a clade and a superorder of mammals, the living members of which belong to one of the five following groups: rodents, lagomorphs, treeshrews, primates, and colugos.
The Euarchontoglires clade is based on DNA sequence analyses and retrotransposon markers that combine the clades Glires (Rodentia + Lagomorpha) and Euarchonta (Scandentia + Primates + Dermoptera). [1] It is usually discussed without a taxonomic rank but has been called a cohort, magnorder, or superorder. Relations among the four cohorts (Euarchontoglires, Xenarthra, Laurasiatheria, Afrotheria) and the identity of the placental root remain controversial. [4] [5]
So far, few, if any, distinctive anatomical features have been recognized that support Euarchontoglires; nor does any strong evidence from anatomy support alternative hypotheses.[ 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] This hypothesis is supported by molecular evidence; so far, the earliest known fossils date to the early Paleocene. [7] The combined clade of Euarchontoglires and Laurasiatheria is recognized as Boreoeutheria.[ citation needed]
The hypothesized relationship among the Euarchontoglires is as follows: [8]
Boreoeutheria |
| ||||||||||||||||||||||||||||||
One study based on DNA analysis suggests that Scandentia and Primates are sister clades, but does not discuss the position of Dermoptera. [9] Although it is known that Scandentia is one of the most basal Euarchontoglires clades, the exact phylogenetic position is not yet considered resolved, and it may be a sister of Glires, Primatomorpha or Dermoptera or to all other Euarchontoglires. [10] [5] [11] Some old studies place Scandentia as sister of the Glires, invalidating Euarchonta. [12] [13]
Whole-genome duplication may have taken place in the ancestral Euarchontoglires. [14]