Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium

Autores
Krmpotic, Cecilia Mariana; Galliari, Fernando Carlos; Barbeito, Claudio Gustavo; Carlini, Alfredo Armando
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The integument of extant armadillos (Xenarthra, Cingulata) is a unique organ in which complex glandular systems are associated with pilose follicles, dermal ossifications, and cornified scales. Up to date, papers have focused on neither comparative morphology of the skin (dorsal and ventral) nor chronology of the development of interspecific homolog structures. In order to clarify the way in which events occur during development of the integument structures, maturity of other tissues (e.g. skeletal tissues) should be considered. Therefore, we will be able to identify events that have been pre- or post-displaced during ontogenetic development. The aim of this paper is to describe in a developmental and comparative framework the integumentary system of neonates of Dasypus hybridus and Chaetophractus vellerosus. In order to understand the morphology of the different integumentary structures serial histological sections were prepared. Staining techniques included H–E, Masson Trichrome, PAS, orcein and reticulin. To study ossification of postcranial elements, the specimens were cleared and double-stained with alcian blue and alizarin red. Determinations of ossification centers and their progress were recorded through the early uptake of alizarin. The dorsal dermis of neonates from D. hybridus is clearly differentiated into a superficial and deep layer, as in fetuses of Dasypus novemcinctus. In C. vellerosus, however, these layers could not be identified. This suggests a less connective tissue differentiation in the latter species at this stage. Osteoderms in D. hybridus are well differentiated unlike C. vellerosus where no condensations of osteoprogenitory cells are observed. Conversely, pilose follicles and glandular tissues are less developed in D. hybridus. Regarding postcranial elements, ossification centers are less advanced in C. vellerosus than D. hybridus, this is particularly notorious for the vertebral column, sternal, and pelvic girdle elements. Asynchronies between neonates of both species observed on integumentary and postcranial skeletal tissues could match with specific adaptive strategies related to distribution in different environments, and/or different postnatal care.
Facultad de Ciencias Naturales y Museo
Facultad de Ciencias Veterinarias
Materia
Ciencias Naturales
Veterinaria
Dasypodidae
Integument
Osteoderm
Postcranium
Neonates
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/137078

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/137078
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcraniumKrmpotic, Cecilia MarianaGalliari, Fernando CarlosBarbeito, Claudio GustavoCarlini, Alfredo ArmandoCiencias NaturalesVeterinariaDasypodidaeIntegumentOsteodermPostcraniumNeonatesThe integument of extant armadillos (Xenarthra, Cingulata) is a unique organ in which complex glandular systems are associated with pilose follicles, dermal ossifications, and cornified scales. Up to date, papers have focused on neither comparative morphology of the skin (dorsal and ventral) nor chronology of the development of interspecific homolog structures. In order to clarify the way in which events occur during development of the integument structures, maturity of other tissues (e.g. skeletal tissues) should be considered. Therefore, we will be able to identify events that have been pre- or post-displaced during ontogenetic development. The aim of this paper is to describe in a developmental and comparative framework the integumentary system of neonates of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>. In order to understand the morphology of the different integumentary structures serial histological sections were prepared. Staining techniques included H–E, Masson Trichrome, PAS, orcein and reticulin. To study ossification of postcranial elements, the specimens were cleared and double-stained with alcian blue and alizarin red. Determinations of ossification centers and their progress were recorded through the early uptake of alizarin. The dorsal dermis of neonates from <i>D. hybridus</i> is clearly differentiated into a superficial and deep layer, as in fetuses of <i>Dasypus novemcinctus</i>. In <i>C. vellerosus</i>, however, these layers could not be identified. This suggests a less connective tissue differentiation in the latter species at this stage. Osteoderms in <i>D. hybridus</i> are well differentiated unlike <i>C. vellerosus</i> where no condensations of osteoprogenitory cells are observed. Conversely, pilose follicles and glandular tissues are less developed in <i>D. hybridus</i>. Regarding postcranial elements, ossification centers are less advanced in <i>C. vellerosus</i> than <i>D. hybridus</i>, this is particularly notorious for the vertebral column, sternal, and pelvic girdle elements. Asynchronies between neonates of both species observed on integumentary and postcranial skeletal tissues could match with specific adaptive strategies related to distribution in different environments, and/or different postnatal care.Facultad de Ciencias Naturales y MuseoFacultad de Ciencias Veterinarias2012-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf314-326http://sedici.unlp.edu.ar/handle/10915/137078enginfo:eu-repo/semantics/altIdentifier/issn/1616-5047info:eu-repo/semantics/altIdentifier/doi/10.1016/j.mambio.2012.02.008info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:02Zoai:sedici.unlp.edu.ar:10915/137078Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:02.427SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
title Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
spellingShingle Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
Krmpotic, Cecilia Mariana
Ciencias Naturales
Veterinaria
Dasypodidae
Integument
Osteoderm
Postcranium
Neonates
title_short Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
title_full Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
title_fullStr Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
title_full_unstemmed Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
title_sort Development of the integument of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>, and asynchronous events with respect to the postcranium
dc.creator.none.fl_str_mv Krmpotic, Cecilia Mariana
Galliari, Fernando Carlos
Barbeito, Claudio Gustavo
Carlini, Alfredo Armando
author Krmpotic, Cecilia Mariana
author_facet Krmpotic, Cecilia Mariana
Galliari, Fernando Carlos
Barbeito, Claudio Gustavo
Carlini, Alfredo Armando
author_role author
author2 Galliari, Fernando Carlos
Barbeito, Claudio Gustavo
Carlini, Alfredo Armando
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Veterinaria
Dasypodidae
Integument
Osteoderm
Postcranium
Neonates
topic Ciencias Naturales
Veterinaria
Dasypodidae
Integument
Osteoderm
Postcranium
Neonates
dc.description.none.fl_txt_mv The integument of extant armadillos (Xenarthra, Cingulata) is a unique organ in which complex glandular systems are associated with pilose follicles, dermal ossifications, and cornified scales. Up to date, papers have focused on neither comparative morphology of the skin (dorsal and ventral) nor chronology of the development of interspecific homolog structures. In order to clarify the way in which events occur during development of the integument structures, maturity of other tissues (e.g. skeletal tissues) should be considered. Therefore, we will be able to identify events that have been pre- or post-displaced during ontogenetic development. The aim of this paper is to describe in a developmental and comparative framework the integumentary system of neonates of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>. In order to understand the morphology of the different integumentary structures serial histological sections were prepared. Staining techniques included H–E, Masson Trichrome, PAS, orcein and reticulin. To study ossification of postcranial elements, the specimens were cleared and double-stained with alcian blue and alizarin red. Determinations of ossification centers and their progress were recorded through the early uptake of alizarin. The dorsal dermis of neonates from <i>D. hybridus</i> is clearly differentiated into a superficial and deep layer, as in fetuses of <i>Dasypus novemcinctus</i>. In <i>C. vellerosus</i>, however, these layers could not be identified. This suggests a less connective tissue differentiation in the latter species at this stage. Osteoderms in <i>D. hybridus</i> are well differentiated unlike <i>C. vellerosus</i> where no condensations of osteoprogenitory cells are observed. Conversely, pilose follicles and glandular tissues are less developed in <i>D. hybridus</i>. Regarding postcranial elements, ossification centers are less advanced in <i>C. vellerosus</i> than <i>D. hybridus</i>, this is particularly notorious for the vertebral column, sternal, and pelvic girdle elements. Asynchronies between neonates of both species observed on integumentary and postcranial skeletal tissues could match with specific adaptive strategies related to distribution in different environments, and/or different postnatal care.
Facultad de Ciencias Naturales y Museo
Facultad de Ciencias Veterinarias
description The integument of extant armadillos (Xenarthra, Cingulata) is a unique organ in which complex glandular systems are associated with pilose follicles, dermal ossifications, and cornified scales. Up to date, papers have focused on neither comparative morphology of the skin (dorsal and ventral) nor chronology of the development of interspecific homolog structures. In order to clarify the way in which events occur during development of the integument structures, maturity of other tissues (e.g. skeletal tissues) should be considered. Therefore, we will be able to identify events that have been pre- or post-displaced during ontogenetic development. The aim of this paper is to describe in a developmental and comparative framework the integumentary system of neonates of <i>Dasypus hybridus</i> and <i>Chaetophractus vellerosus</i>. In order to understand the morphology of the different integumentary structures serial histological sections were prepared. Staining techniques included H–E, Masson Trichrome, PAS, orcein and reticulin. To study ossification of postcranial elements, the specimens were cleared and double-stained with alcian blue and alizarin red. Determinations of ossification centers and their progress were recorded through the early uptake of alizarin. The dorsal dermis of neonates from <i>D. hybridus</i> is clearly differentiated into a superficial and deep layer, as in fetuses of <i>Dasypus novemcinctus</i>. In <i>C. vellerosus</i>, however, these layers could not be identified. This suggests a less connective tissue differentiation in the latter species at this stage. Osteoderms in <i>D. hybridus</i> are well differentiated unlike <i>C. vellerosus</i> where no condensations of osteoprogenitory cells are observed. Conversely, pilose follicles and glandular tissues are less developed in <i>D. hybridus</i>. Regarding postcranial elements, ossification centers are less advanced in <i>C. vellerosus</i> than <i>D. hybridus</i>, this is particularly notorious for the vertebral column, sternal, and pelvic girdle elements. Asynchronies between neonates of both species observed on integumentary and postcranial skeletal tissues could match with specific adaptive strategies related to distribution in different environments, and/or different postnatal care.
publishDate 2012
dc.date.none.fl_str_mv 2012-09
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info:eu-repo/semantics/publishedVersion
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.mambio.2012.02.008
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
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