Ring-tailed Lemur (Lemur katta )
The Boreoeutheria are a group within the higher mammals ( Eutheria ). They were described in 2001 on the basis of genetic studies as a taxon and include all higher mammals except the Xenarthra and Afrotheria the. They walked in front of about 110 million years ago along with the Xenarthra as Exafroplacentalia from the group of Eutheria forth. Prior to about 100-105 million years ago they split up into the two mammalian superorders Euarchontoglires and Laurasiatheria.
The following cladogram shows the systematic position of the Boreoeutheria:
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