Molecular phylogenetics and the origins of placental mammals

@article{Murphy2001MolecularPA,
  title={Molecular phylogenetics and the origins of placental mammals},
  author={William J. Murphy and Eduardo Eizirik and Warren E. Johnson and Ya Ping Zhang and Oliver A. Ryder and Stephen J. O’Brien},
  journal={Nature},
  year={2001},
  volume={409},
  pages={614-618}
}
The precise hierarchy of ancient divergence events that led to the present assemblage of modern placental mammals has been an area of controversy among morphologists, palaeontologists and molecular evolutionists. Here we address the potential weaknesses of limited character and taxon sampling in a comprehensive molecular phylogenetic analysis of 64 species sampled across all extant orders of placental mammals. We examined sequence variation in 18 homologous gene segments (including nearly 10… 

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