Boreoeutheria

Boreoeutheria
	Boreoeutheria
Systematics
without rank:	Amniotes (Amniota)
	Synapsids (Synapsida)
Class :	Mammals (mammalia)
Subclass :	Higher mammals (Eutheria)
without rank:	Exafroplacentalia
without rank:	Boreoeutheria
Scientific name
	Boreoeutheria
	Springer & de Jong , 2001
Superordinates
	Laurasiatheria; Euarchontoglires;

The Boreoeutheria are a group within the higher mammals (Eutheria). They were described as taxons in 2001 based on genetic studies and include all higher mammals except the Xenarthra and Afrotheria . They emerged about 110 million years ago together with the Xenarthra as Exafroplacentalia from the group of Eutheria . About 100-105 million years ago, they split into the two mammalian superordinates Euarchontoglires and Laurasiatheria .

Systematics

The following cladogram shows the systematic position of Boreoeutheria:

Eutheria

Boreoeutheria

PJ Waddell, H. Kishino, R. Ota: A phylogenetic foundation for comparative mammalian genomics. In: Genome Inform Ser Workshop Genome Inform. 12, 2001, pp. 141-154. ( www.jsbi.org ( Memento from April 23, 2010 in the Internet Archive ))
Mark S. Springer, William J. Murphy, Eduardo Eizirik, Stephen J. O'Brien: Placental mammal diversification and the Cretaceous-Tertiary boundary. In: PNAS. 100 (3), February 4, 2003, pp. 1056-1061. (pnas.org)
DE Wildman, C. Chen, O. Erez, LI Grossman, M. Goodman, R. Romero: Evolution of the mammalian placenta revealed by phylogenetic analysis. In: PNAS . 103 (9), 2006, pp. 3203-3208. (pnas.org)
S. Nikolaev, JI Montoya-Burgos, EH Margulies, J. Rougemont, B. Nyffeler, SE Antonarakis: Early history of mammals is elucidated with the ENCODE multiple species sequencing data. In: PLoS Genet . 3, 2007, p. E2. (plosgenetics.org) doi: 10.1371 / journal.pgen.0030002 .
Gennady Churakov, Jan Ole Kriegs, Robert Baertsch, Anja Zemann, Jürgen Brosius, Jürgen Schmitz: Mosaic retroposon insertion patterns in placental mammals. 2008. (genome.cshlp.org)