Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective

The rich fossil record of horses has made them a classic example of evolutionary processes. However, while the overall picture of equid evolution is well known, the details are surprisingly poorly understood, especially for the later Pliocene and Pleistocene, c. 3 million to 0.01 million years (Ma)...

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Autores principales: Weinstock, Jaco, Willerslev, Eske, Sher, Andrei, Tong, Wenfei, Ho, Simon Y. W., Rubenstein, Dan, Storer, John, Burns, James, Martin, Larry, Bravi, Claudio Marcelo, Prieto, Alfredo, Froese, Duane, Scott, Eric, Xulong, Lai, Cooper, Alan
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Naturales
Pleistocene Horses
Hippidion
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83263
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83263
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Pleistocene Horses
Hippidion
spellingShingle Ciencias Naturales
Pleistocene Horses
Hippidion
Weinstock, Jaco
Willerslev, Eske
Sher, Andrei
Tong, Wenfei
Ho, Simon Y. W.
Rubenstein, Dan
Storer, John
Burns, James
Martin, Larry
Bravi, Claudio Marcelo
Prieto, Alfredo
Froese, Duane
Scott, Eric
Xulong, Lai
Cooper, Alan
Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective
topic_facet Ciencias Naturales
Pleistocene Horses
Hippidion
description The rich fossil record of horses has made them a classic example of evolutionary processes. However, while the overall picture of equid evolution is well known, the details are surprisingly poorly understood, especially for the later Pliocene and Pleistocene, c. 3 million to 0.01 million years (Ma) ago, and nowhere more so than in the Americas. There is no consensus on the number of equid species or even the number of lineages that existed in these continents. Likewise, the origin of the endemic South American genus <i>Hippidion</i> is unresolved, as is the phylogenetic position of the "stilt-legged" horses of North America. Using ancient DNA sequences, we show that, in contrast to current models based on morphology and a recent genetic study, <i>Hippidion</i> was phylogenetically close to the caballine (true) horses, with origins considerably more recent than the currently accepted date of c. 10 Ma. Furthermore, we show that stilt-legged horses, commonly regarded as Old World migrants related to the hemionid asses of Asia, were in fact an endemic North American lineage. Finally, our data suggest that there were fewer horse species in late Pleistocene North America than have been named on morphological grounds. Both caballine and stilt-legged lineages may each have comprised a single, wide-ranging species.
format Articulo
Articulo
author Weinstock, Jaco
Willerslev, Eske
Sher, Andrei
Tong, Wenfei
Ho, Simon Y. W.
Rubenstein, Dan
Storer, John
Burns, James
Martin, Larry
Bravi, Claudio Marcelo
Prieto, Alfredo
Froese, Duane
Scott, Eric
Xulong, Lai
Cooper, Alan
author_facet Weinstock, Jaco
Willerslev, Eske
Sher, Andrei
Tong, Wenfei
Ho, Simon Y. W.
Rubenstein, Dan
Storer, John
Burns, James
Martin, Larry
Bravi, Claudio Marcelo
Prieto, Alfredo
Froese, Duane
Scott, Eric
Xulong, Lai
Cooper, Alan
author_sort Weinstock, Jaco
title Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective
title_short Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective
title_full Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective
title_fullStr Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective
title_full_unstemmed Evolution, systematics, and phylogeography of Pleistocene horses in the new world: A molecular perspective
title_sort evolution, systematics, and phylogeography of pleistocene horses in the new world: a molecular perspective
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/83263
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