Molecular systematics and paleobiogeography of the South American sigmodontine rodents.

@article{Engel1998MolecularSA,
  title={Molecular systematics and paleobiogeography of the South American sigmodontine rodents.},
  author={Stefanie Engel and Kharim Hogan and Jeremy F. Taylor and Scott K. Davis},
  journal={Molecular biology and evolution},
  year={1998},
  volume={15 1},
  pages={35-49}
}
The murid rodent subfamily Sigmodontinae contains 79 genera which are distributed throughout the New World. The time of arrival of the first sigmodontines in South America and the estimated divergence time(s) of the different lineages of South American sigmodontines have been controversial due to the lack of a good fossil record and the immense number of extant species. The "early-arrival hypothesis" states that the sigmodontines must have arrived in South America no later than the early… CONTINUE READING