Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)

Intraspecific and interspecific variation in cervical, thoracic, and lumbar region of the vertebral column of Dasypodidae were examined in a phylogenetic framework. The number of vertebrae for each region were recorded for 86 specimens and metric data for each vertebra (centrum length, high, and wid...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Galliari, Fernando Carlos, Carlini, Alfredo Armando, Sánchez-Villagra, Marcelo R.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Naturales
Vertebra
Modularity
Constraint
Phylogeny
Xenarthra
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/135012
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-135012
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
Vertebra
Modularity
Constraint
Phylogeny
Xenarthra
spellingShingle Ciencias Naturales
Vertebra
Modularity
Constraint
Phylogeny
Xenarthra
Galliari, Fernando Carlos
Carlini, Alfredo Armando
Sánchez-Villagra, Marcelo R.
Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)
topic_facet Ciencias Naturales
Vertebra
Modularity
Constraint
Phylogeny
Xenarthra
description Intraspecific and interspecific variation in cervical, thoracic, and lumbar region of the vertebral column of Dasypodidae were examined in a phylogenetic framework. The number of vertebrae for each region were recorded for 86 specimens and metric data for each vertebra (centrum length, high, and width) were recorded for 72 specimens, including eight of the nine living genera. The number of vertebrae and degree of fusion between them were used to define four characters which were plotted on two alternative phylogenies of Dasypodidae. The ratio between centrum height and width is similar across all taxa analyzed except for <i>Chlamyphorus</i>, which exhibits a deviation in the last two lumbars. <i>Tolypeutes matacus</i> is unique among the taxa examined in having a second co-osified bone called postcervical bone, which is a fusion of the seventh cervical and first thoracic vertebrae. The thoraco-lumbar numbers of dasypodids are reduced when compared with other xenarthrans and are more diverse than those of some other mammalian clades of similar geological age and higher ecomorphological diversity. Changes in size are somewhat coupled with changes in the number of body segments. Independent of the phylogenetic framework taken, changes in size are accompanied with small changes in numbers of thoracolumbar vertebrae within each genus. There are functional and phylogenetic correlates for changes in number of thoraco-lumbar vertebrae in dasypodids.
format Articulo
Articulo
author Galliari, Fernando Carlos
Carlini, Alfredo Armando
Sánchez-Villagra, Marcelo R.
author_facet Galliari, Fernando Carlos
Carlini, Alfredo Armando
Sánchez-Villagra, Marcelo R.
author_sort Galliari, Fernando Carlos
title Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)
title_short Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)
title_full Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)
title_fullStr Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)
title_full_unstemmed Evolution of the axial skeleton in armadillos (Mammalia, Dasypodidae)
title_sort evolution of the axial skeleton in armadillos (mammalia, dasypodidae)
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/135012
work_keys_str_mv AT galliarifernandocarlos evolutionoftheaxialskeletoninarmadillosmammaliadasypodidae
AT carlinialfredoarmando evolutionoftheaxialskeletoninarmadillosmammaliadasypodidae
AT sanchezvillagramarcelor evolutionoftheaxialskeletoninarmadillosmammaliadasypodidae
bdutipo_str Repositorios
_version_ 1764820455970045953

Ejemplares similares