Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives

Autores
Forasiepi, Analia Marta; Sánchez Villagra, Marcelo Ricardo
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In marsupial mammals and their extinct relatives-collectively, metatherians-only the last premolar is replaced, but the timing of dental eruption is variable within the group. Our knowledge of fossils metatherians is limited, but is critical to understanding several aspects of the evolution and morphological diversification of this clade. We analyzed the sequence of eruption of 76 specimens of metatherians, including Sparassodonta, an extinct clade of specialized carnivores from South America. In Sparassodonta (1) the P3/p3 erupt simultaneously, in common with some didelphids (in other didelphids, p3 erupts before P3, whereas in the remaining didelphids, some peramelids, one caenolestid, and Pucadelphys this order is reversed); (2) the upper and lower molars at the same locus erupt more in synchrony than in other carnivorous metatherians in which the lower molars clearly precede the upper equivalents; (3) the upper canine in thylacosmilids and proborhyaenids is hypselodont; (4) species with similar molar morphologies have different morphologies of the deciduous premolars, suggesting diverse diets among the juveniles of different taxa; (5) deciduous teeth are functional for a long period of time, with thylacosmilids even retaining a functional DP3 in the permanent dentition. The retention of the DP3 and the hypertrophied and hypselodont upper canine of thylacosmilids represent clear heterochronic shifts. Specializations in the timing of dental eruption and in the deciduous tooth shape of sparassodonts are evolutionary mechanisms that circumvent constraints imposed by the metatherian replacement pattern and increase morphological disparity during ontogeny.
Fil: Forasiepi, Analia Marta. Universitat Zurich. Instituto Palaontologisches Institut And Museum; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Sánchez Villagra, Marcelo Ricardo. Universitat Zurich. Instituto Palaontologisches Institut And Museum; Suiza
Materia
Dntition
Ontogeny
Evolution
Metatheria
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/182938

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spelling Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relativesForasiepi, Analia MartaSánchez Villagra, Marcelo RicardoDntitionOntogenyEvolutionMetatheriahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In marsupial mammals and their extinct relatives-collectively, metatherians-only the last premolar is replaced, but the timing of dental eruption is variable within the group. Our knowledge of fossils metatherians is limited, but is critical to understanding several aspects of the evolution and morphological diversification of this clade. We analyzed the sequence of eruption of 76 specimens of metatherians, including Sparassodonta, an extinct clade of specialized carnivores from South America. In Sparassodonta (1) the P3/p3 erupt simultaneously, in common with some didelphids (in other didelphids, p3 erupts before P3, whereas in the remaining didelphids, some peramelids, one caenolestid, and Pucadelphys this order is reversed); (2) the upper and lower molars at the same locus erupt more in synchrony than in other carnivorous metatherians in which the lower molars clearly precede the upper equivalents; (3) the upper canine in thylacosmilids and proborhyaenids is hypselodont; (4) species with similar molar morphologies have different morphologies of the deciduous premolars, suggesting diverse diets among the juveniles of different taxa; (5) deciduous teeth are functional for a long period of time, with thylacosmilids even retaining a functional DP3 in the permanent dentition. The retention of the DP3 and the hypertrophied and hypselodont upper canine of thylacosmilids represent clear heterochronic shifts. Specializations in the timing of dental eruption and in the deciduous tooth shape of sparassodonts are evolutionary mechanisms that circumvent constraints imposed by the metatherian replacement pattern and increase morphological disparity during ontogeny.Fil: Forasiepi, Analia Marta. Universitat Zurich. Instituto Palaontologisches Institut And Museum; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Sánchez Villagra, Marcelo Ricardo. Universitat Zurich. Instituto Palaontologisches Institut And Museum; SuizaCambridge University Press2014-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/zipapplication/pdfhttp://hdl.handle.net/11336/182938Forasiepi, Analia Marta; Sánchez Villagra, Marcelo Ricardo; Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives; Cambridge University Press; Paleobiology; 40; 2; 4-2014; 222-2370094-83731938-5331CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/paleobiology/volume-40/issue-2/13034/Heterochrony-dental-ontogenetic-diversity-and-the-circumvention-of-constraints-in/10.1666/13034.shortinfo:eu-repo/semantics/altIdentifier/doi/10.1666/13034info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/paleobiology/article/abs/heterochrony-dental-ontogenetic-diversity-and-the-circumvention-of-constraints-in-marsupial-mammals-and-extinct-relatives/D49802AF9B09A85F0887CC9754EB9FC1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:51Zoai:ri.conicet.gov.ar:11336/182938instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:44:51.579CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
title Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
spellingShingle Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
Forasiepi, Analia Marta
Dntition
Ontogeny
Evolution
Metatheria
title_short Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
title_full Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
title_fullStr Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
title_full_unstemmed Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
title_sort Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives
dc.creator.none.fl_str_mv Forasiepi, Analia Marta
Sánchez Villagra, Marcelo Ricardo
author Forasiepi, Analia Marta
author_facet Forasiepi, Analia Marta
Sánchez Villagra, Marcelo Ricardo
author_role author
author2 Sánchez Villagra, Marcelo Ricardo
author2_role author
dc.subject.none.fl_str_mv Dntition
Ontogeny
Evolution
Metatheria
topic Dntition
Ontogeny
Evolution
Metatheria
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In marsupial mammals and their extinct relatives-collectively, metatherians-only the last premolar is replaced, but the timing of dental eruption is variable within the group. Our knowledge of fossils metatherians is limited, but is critical to understanding several aspects of the evolution and morphological diversification of this clade. We analyzed the sequence of eruption of 76 specimens of metatherians, including Sparassodonta, an extinct clade of specialized carnivores from South America. In Sparassodonta (1) the P3/p3 erupt simultaneously, in common with some didelphids (in other didelphids, p3 erupts before P3, whereas in the remaining didelphids, some peramelids, one caenolestid, and Pucadelphys this order is reversed); (2) the upper and lower molars at the same locus erupt more in synchrony than in other carnivorous metatherians in which the lower molars clearly precede the upper equivalents; (3) the upper canine in thylacosmilids and proborhyaenids is hypselodont; (4) species with similar molar morphologies have different morphologies of the deciduous premolars, suggesting diverse diets among the juveniles of different taxa; (5) deciduous teeth are functional for a long period of time, with thylacosmilids even retaining a functional DP3 in the permanent dentition. The retention of the DP3 and the hypertrophied and hypselodont upper canine of thylacosmilids represent clear heterochronic shifts. Specializations in the timing of dental eruption and in the deciduous tooth shape of sparassodonts are evolutionary mechanisms that circumvent constraints imposed by the metatherian replacement pattern and increase morphological disparity during ontogeny.
Fil: Forasiepi, Analia Marta. Universitat Zurich. Instituto Palaontologisches Institut And Museum; Suiza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Sánchez Villagra, Marcelo Ricardo. Universitat Zurich. Instituto Palaontologisches Institut And Museum; Suiza
description In marsupial mammals and their extinct relatives-collectively, metatherians-only the last premolar is replaced, but the timing of dental eruption is variable within the group. Our knowledge of fossils metatherians is limited, but is critical to understanding several aspects of the evolution and morphological diversification of this clade. We analyzed the sequence of eruption of 76 specimens of metatherians, including Sparassodonta, an extinct clade of specialized carnivores from South America. In Sparassodonta (1) the P3/p3 erupt simultaneously, in common with some didelphids (in other didelphids, p3 erupts before P3, whereas in the remaining didelphids, some peramelids, one caenolestid, and Pucadelphys this order is reversed); (2) the upper and lower molars at the same locus erupt more in synchrony than in other carnivorous metatherians in which the lower molars clearly precede the upper equivalents; (3) the upper canine in thylacosmilids and proborhyaenids is hypselodont; (4) species with similar molar morphologies have different morphologies of the deciduous premolars, suggesting diverse diets among the juveniles of different taxa; (5) deciduous teeth are functional for a long period of time, with thylacosmilids even retaining a functional DP3 in the permanent dentition. The retention of the DP3 and the hypertrophied and hypselodont upper canine of thylacosmilids represent clear heterochronic shifts. Specializations in the timing of dental eruption and in the deciduous tooth shape of sparassodonts are evolutionary mechanisms that circumvent constraints imposed by the metatherian replacement pattern and increase morphological disparity during ontogeny.
publishDate 2014
dc.date.none.fl_str_mv 2014-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/182938
Forasiepi, Analia Marta; Sánchez Villagra, Marcelo Ricardo; Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives; Cambridge University Press; Paleobiology; 40; 2; 4-2014; 222-237
0094-8373
1938-5331
CONICET Digital
CONICET
url http://hdl.handle.net/11336/182938
identifier_str_mv Forasiepi, Analia Marta; Sánchez Villagra, Marcelo Ricardo; Heterochrony, dental ontogenetic diversity, and the circumvention of constraints in marsupial mammals and extinct relatives; Cambridge University Press; Paleobiology; 40; 2; 4-2014; 222-237
0094-8373
1938-5331
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/paleobiology/volume-40/issue-2/13034/Heterochrony-dental-ontogenetic-diversity-and-the-circumvention-of-constraints-in/10.1666/13034.short
info:eu-repo/semantics/altIdentifier/doi/10.1666/13034
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/paleobiology/article/abs/heterochrony-dental-ontogenetic-diversity-and-the-circumvention-of-constraints-in-marsupial-mammals-and-extinct-relatives/D49802AF9B09A85F0887CC9754EB9FC1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/zip
application/pdf
dc.publisher.none.fl_str_mv Cambridge University Press
publisher.none.fl_str_mv Cambridge University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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