Exafroplacentalia

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Exafroplacentals
Temporal range: Paleocene - Holocene, 65–0Ma
Stavenn Tupaia glis 00.jpg
Common Treeshrew
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Eutheria
Infraclass: Placentalia
Subcohort: Exafroplacentalia
Waddell et al, 2001
Orders and Clades

Magnorder Boreoeutheria:

Exafroplacentalia or Notolegia is a clade of placental mammals proposed in 2001 on the basis of molecular research.[1][2]

Exafroplacentalia places Xenarthra as a sister group to the Boreoeutheria (comprising Laurasiatheria and Euarchontoglires),[3] thus making Afrotheria a primitive group of placental mammals (the group name roughly means "those which are not African placentals").

Updated analysis of transposable element insertions around the time of divergence strongly supports the fourth hypothesis of a near-concomitant origin (trifurcation) of the three superorders of mammals.[clarification needed][4]

Classification[edit]

Eutheria  

Afrotheria


  Exafroplacentalia  

Xenarthra


  Boreoeutheria  
   

Laurasiatheria


   

Euarchontoglires





See also[edit]

References[edit]

  1. ^ Murphy, W.J., Pringle, T.H., Crider, T.A., Springer, M.S. & Miller, W. 2007. Using genomic data to unravel the root of the placental mammal phylogeny. Genome Research 17, pp.413-421.
  2. ^ Kriegs, J.O., Churakov, G., Kiefmann, M., Jordan, U., Brosius, J. & Schmitz, J. 2006. Retroposed elements as archives for the evolutionary history of placental mammals. Plos Biol 4, pp.e91.
  3. ^ Goloboff, Pablo A.; Catalano, Santiago A.; Mirande, J. Marcos; Szumik, Claudia A.; Arias, J. Salvador; Källersjö, Mari; Farris, James S. (2009). "Phylogenetic analysis of 73 060 taxa corroborates major eukaryotic groups". Cladistics 25 (3): 211–230. doi:10.1111/j.1096-0031.2009.00255.x.  edit
  4. ^ Nishihara, H., Maruyama, S. & Okada, N. 2009. Retroposon analysis and recent geological data suggest near-simultaneous divergence of the three superorders of placental mammals. PNAS 106: 5235-40.

Further reading[edit]