The phylogenetic affinities of the extinct glyptodonts

Among the fossils of hitherto unknown mammals that Darwin collected in South America between 1832 and 1833 during the Beagle expedition [1] were examples of the large, heavily armored herbivores later known as glyptodonts. Ever since, glyptodonts have fascinated evolutionary biologists because of th...

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Detalles Bibliográficos
Autores principales: Delsuc, Frédéric, Gibb, Gillian C., Kuch, Melanie, Billet, Guillaume, Hautier, Lionel, Southon, John, Rouillard, Jean-Marie, Fernícola, Juan Carlos, Vizcaíno, Sergio Fabián, MacPhee, Ross D.E., Poinar, Hendrik N.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Zoología
Mammals
Genetic
Genome
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86793
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86793
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Mammals
Genetic
Genome
spellingShingle Zoología
Mammals
Genetic
Genome
Delsuc, Frédéric
Gibb, Gillian C.
Kuch, Melanie
Billet, Guillaume
Hautier, Lionel
Southon, John
Rouillard, Jean-Marie
Fernícola, Juan Carlos
Vizcaíno, Sergio Fabián
MacPhee, Ross D.E.
Poinar, Hendrik N.
The phylogenetic affinities of the extinct glyptodonts
topic_facet Zoología
Mammals
Genetic
Genome
description Among the fossils of hitherto unknown mammals that Darwin collected in South America between 1832 and 1833 during the Beagle expedition [1] were examples of the large, heavily armored herbivores later known as glyptodonts. Ever since, glyptodonts have fascinated evolutionary biologists because of their remarkable skeletal adaptations and seemingly isolated phylogenetic position even within their natural group, the cingulate xenarthrans (armadillos and their allies [2]). In possessing a carapace comprised of fused osteoderms, the glyptodonts were clearly related to other cingulates, but their precise phylogenetic position as suggested by morphology remains unresolved [3,4]. To provide a molecular perspective on this issue, we designed sequence-capture baits using in silico reconstructed ancestral sequences and successfully assembled the complete mitochondrial genome of Doedicurus sp., one of the largest glyptodonts. Our phylogenetic reconstructions establish that glyptodonts are in fact deeply nested within the armadillo crown-group, representing a distinct subfamily (Glyptodontinae) within family Chlamyphoridae [5]. Molecular dating suggests that glyptodonts diverged no earlier than around 35 million years ago, in good agreement with their fossil record. Our results highlight the derived nature of the glyptodont morphotype, one aspect of which is a spectacular increase in body size until their extinction at the end of the last ice age.
format Articulo
Articulo
author Delsuc, Frédéric
Gibb, Gillian C.
Kuch, Melanie
Billet, Guillaume
Hautier, Lionel
Southon, John
Rouillard, Jean-Marie
Fernícola, Juan Carlos
Vizcaíno, Sergio Fabián
MacPhee, Ross D.E.
Poinar, Hendrik N.
author_facet Delsuc, Frédéric
Gibb, Gillian C.
Kuch, Melanie
Billet, Guillaume
Hautier, Lionel
Southon, John
Rouillard, Jean-Marie
Fernícola, Juan Carlos
Vizcaíno, Sergio Fabián
MacPhee, Ross D.E.
Poinar, Hendrik N.
author_sort Delsuc, Frédéric
title The phylogenetic affinities of the extinct glyptodonts
title_short The phylogenetic affinities of the extinct glyptodonts
title_full The phylogenetic affinities of the extinct glyptodonts
title_fullStr The phylogenetic affinities of the extinct glyptodonts
title_full_unstemmed The phylogenetic affinities of the extinct glyptodonts
title_sort phylogenetic affinities of the extinct glyptodonts
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/86793
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