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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/182938
Ver los metadatos del registro completo
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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/ |
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application/pdf application/zip application/pdf |
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Cambridge University Press |
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Cambridge University Press |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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