Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology

Autores
Cassini, Guillermo Hernán; Flores, David Alfredo; Vizcaíno, Sergio Fabián
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Toxodontidae is a clade of endemic South American ungulates that comprises medium to very large animals, including strict megammamals, i.e., 1000kg or more. Adinotherium at approximately 120kg and Nesodon at 550kg are, respectively, the smallest and the largest Nesodontinae of Santacrucian age (early Miocene). The large number of specimens recorded and the quality of preservation (including very young animals) permit a morphometric study of cranial ontogeny. We measured 17 cranial variables on an ontogenetic series of 23 specimens of Adinotherium ovinum and 11 of Nesodon imbricatus. Bivariate analysis (standardized major axis) was performed to obtain the coefficients of allometry using skull length as the independent variable. Results indicate that eight of 16 variables show an isometric trend, seven exhibit positive allometry, and only the height of the orbit in N. imbricatus exhibits negative allometry. Contrary to expectation, neurocranial variables are positively allometric or isometric. With respect to the splanchnocranium, most variables related to the rostrum, palate, and masticatory muscles show positive allometry, suggesting a strengthening of masticatory system in adults of both taxa. The splanchnocranial allometric trends fail to support previous inferences of specialized herbivory, suggesting generalized herbivory in nesodontines.
Fil: Cassini, Guillermo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Flores, David Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Materia
Adinotherium
Allometry
Masticatory Muscles
Miocene
Nesodon
Patagonia
South America
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:11336/81335
Acceder
id CONICETDig_111d84ee7d7d650b797c5ab62ad0d7f1
oai_identifier_str oai:ri.conicet.gov.ar:11336/81335
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphologyCassini, Guillermo HernánFlores, David AlfredoVizcaíno, Sergio FabiánAdinotheriumAllometryMasticatory MusclesMioceneNesodonPatagoniaSouth Americahttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Toxodontidae is a clade of endemic South American ungulates that comprises medium to very large animals, including strict megammamals, i.e., 1000kg or more. Adinotherium at approximately 120kg and Nesodon at 550kg are, respectively, the smallest and the largest Nesodontinae of Santacrucian age (early Miocene). The large number of specimens recorded and the quality of preservation (including very young animals) permit a morphometric study of cranial ontogeny. We measured 17 cranial variables on an ontogenetic series of 23 specimens of Adinotherium ovinum and 11 of Nesodon imbricatus. Bivariate analysis (standardized major axis) was performed to obtain the coefficients of allometry using skull length as the independent variable. Results indicate that eight of 16 variables show an isometric trend, seven exhibit positive allometry, and only the height of the orbit in N. imbricatus exhibits negative allometry. Contrary to expectation, neurocranial variables are positively allometric or isometric. With respect to the splanchnocranium, most variables related to the rostrum, palate, and masticatory muscles show positive allometry, suggesting a strengthening of masticatory system in adults of both taxa. The splanchnocranial allometric trends fail to support previous inferences of specialized herbivory, suggesting generalized herbivory in nesodontines.Fil: Cassini, Guillermo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ArgentinaFil: Flores, David Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ArgentinaWiley Blackwell Publishing, Inc2012-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81335Cassini, Guillermo Hernán; Flores, David Alfredo; Vizcaíno, Sergio Fabián; Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology; Wiley Blackwell Publishing, Inc; Acta Zoologica; 93; 3; 7-2012; 249-2590001-7272CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1463-6395.2011.00501.xinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1463-6395.2011.00501.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:38:52Zoai:ri.conicet.gov.ar:11336/81335instacron: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:34982025-10-15 15:38:52.762CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
title Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
spellingShingle Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
Cassini, Guillermo Hernán
Adinotherium
Allometry
Masticatory Muscles
Miocene
Nesodon
Patagonia
South America
title_short Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
title_full Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
title_fullStr Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
title_full_unstemmed Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
title_sort Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology
dc.creator.none.fl_str_mv Cassini, Guillermo Hernán
Flores, David Alfredo
Vizcaíno, Sergio Fabián
author Cassini, Guillermo Hernán
author_facet Cassini, Guillermo Hernán
Flores, David Alfredo
Vizcaíno, Sergio Fabián
author_role author
author2 Flores, David Alfredo
Vizcaíno, Sergio Fabián
author2_role author
author
dc.subject.none.fl_str_mv Adinotherium
Allometry
Masticatory Muscles
Miocene
Nesodon
Patagonia
South America
topic Adinotherium
Allometry
Masticatory Muscles
Miocene
Nesodon
Patagonia
South America
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Toxodontidae is a clade of endemic South American ungulates that comprises medium to very large animals, including strict megammamals, i.e., 1000kg or more. Adinotherium at approximately 120kg and Nesodon at 550kg are, respectively, the smallest and the largest Nesodontinae of Santacrucian age (early Miocene). The large number of specimens recorded and the quality of preservation (including very young animals) permit a morphometric study of cranial ontogeny. We measured 17 cranial variables on an ontogenetic series of 23 specimens of Adinotherium ovinum and 11 of Nesodon imbricatus. Bivariate analysis (standardized major axis) was performed to obtain the coefficients of allometry using skull length as the independent variable. Results indicate that eight of 16 variables show an isometric trend, seven exhibit positive allometry, and only the height of the orbit in N. imbricatus exhibits negative allometry. Contrary to expectation, neurocranial variables are positively allometric or isometric. With respect to the splanchnocranium, most variables related to the rostrum, palate, and masticatory muscles show positive allometry, suggesting a strengthening of masticatory system in adults of both taxa. The splanchnocranial allometric trends fail to support previous inferences of specialized herbivory, suggesting generalized herbivory in nesodontines.
Fil: Cassini, Guillermo Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
Fil: Flores, David Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Vizcaíno, Sergio Fabián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
description Toxodontidae is a clade of endemic South American ungulates that comprises medium to very large animals, including strict megammamals, i.e., 1000kg or more. Adinotherium at approximately 120kg and Nesodon at 550kg are, respectively, the smallest and the largest Nesodontinae of Santacrucian age (early Miocene). The large number of specimens recorded and the quality of preservation (including very young animals) permit a morphometric study of cranial ontogeny. We measured 17 cranial variables on an ontogenetic series of 23 specimens of Adinotherium ovinum and 11 of Nesodon imbricatus. Bivariate analysis (standardized major axis) was performed to obtain the coefficients of allometry using skull length as the independent variable. Results indicate that eight of 16 variables show an isometric trend, seven exhibit positive allometry, and only the height of the orbit in N. imbricatus exhibits negative allometry. Contrary to expectation, neurocranial variables are positively allometric or isometric. With respect to the splanchnocranium, most variables related to the rostrum, palate, and masticatory muscles show positive allometry, suggesting a strengthening of masticatory system in adults of both taxa. The splanchnocranial allometric trends fail to support previous inferences of specialized herbivory, suggesting generalized herbivory in nesodontines.
publishDate 2012
dc.date.none.fl_str_mv 2012-07
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/11336/81335
Cassini, Guillermo Hernán; Flores, David Alfredo; Vizcaíno, Sergio Fabián; Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology; Wiley Blackwell Publishing, Inc; Acta Zoologica; 93; 3; 7-2012; 249-259
0001-7272
CONICET Digital
CONICET
url http://hdl.handle.net/11336/81335
identifier_str_mv Cassini, Guillermo Hernán; Flores, David Alfredo; Vizcaíno, Sergio Fabián; Postnatal ontogenetic scaling of Nesodontine (Notoungulata, Toxodontidae) cranial morphology; Wiley Blackwell Publishing, Inc; Acta Zoologica; 93; 3; 7-2012; 249-259
0001-7272
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://onlinelibrary.wiley.com/doi/abs/10.1111/j.1463-6395.2011.00501.x
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1463-6395.2011.00501.x
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/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846083506227118080
score 13.22299

Publicaciones similares