The effects of skull flattening on suchian jaw muscle evolution
- Autores
- Sellers, Kaleb C.; Nieto, Mauro Nicolas; Degrange, Federico Javier; Pol, Diego; Clark, James M.; Middleton, Kevin M.; Holliday, Casey M.
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Jaw muscles are key features of the vertebrate feeding apparatus. The jaw musculature is housed in the skull whose morphology reflects a compromise between multiple functions, including feeding, housing sensory structures, and defense, and the skull constrains jaw muscle geometry. Thus, jaw muscle anatomy may be suboptimally oriented for the production of bite force. Crocodylians are a group of vertebrates that generate the highest bite forces ever measured with a flat skull suited to their aquatic ambush predatory style. However, basal members of the crocodylian line (e.g., Prestosuchus) were terrestrial predators with plesiomorphically tall skulls, and thus the origin of modern crocodylians involved a substantial reorganization of the feeding apparatus and its jaw muscles. Here, we reconstruct jaw muscles across a phylogenetic range of crocodylians and fossil suchians to investigate the impact of skull flattening on muscle anatomy. We used imaging data to create 3D models of extant and fossil suchians that demonstrate the evolution of the crocodylian skull, using osteological correlates to reconstruct muscle attachment sites. We found that jaw muscle anatomy in early fossil suchians reflected the ancestral archosaur condition but experienced progressive shifts in the lineage leading to Metasuchia. In early fossil suchians, musculus adductor mandibulae posterior and musculus pterygoideus (mPT) were of comparable size, but by Metasuchia, the jaw musculature is dominated by mPT. As predicted, we found that taxa with flatter skulls have less efficient muscle orientations for the production of high bite force. This study highlights the diversity and evolution of jaw muscles in one of the great transformations in vertebrate evolution.
Fil: Sellers, Kaleb C.. University of Missouri; Estados Unidos
Fil: Nieto, Mauro Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Degrange, Federico Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Pol, Diego. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Clark, James M.. The George Washington University. Columbian College Of Arts And Sciences. Department Of Biological Sciences.; Estados Unidos
Fil: Middleton, Kevin M.. University of Missouri; Estados Unidos
Fil: Holliday, Casey M.. University of Missouri; Estados Unidos - Materia
-
BIOMECHANICS
CROCODYLIA
JAW MUSCLES
SKULL - 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:11336/216728
Ver los metadatos del registro completo
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The effects of skull flattening on suchian jaw muscle evolutionSellers, Kaleb C.Nieto, Mauro NicolasDegrange, Federico JavierPol, DiegoClark, James M.Middleton, Kevin M.Holliday, Casey M.BIOMECHANICSCROCODYLIAJAW MUSCLESSKULLhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Jaw muscles are key features of the vertebrate feeding apparatus. The jaw musculature is housed in the skull whose morphology reflects a compromise between multiple functions, including feeding, housing sensory structures, and defense, and the skull constrains jaw muscle geometry. Thus, jaw muscle anatomy may be suboptimally oriented for the production of bite force. Crocodylians are a group of vertebrates that generate the highest bite forces ever measured with a flat skull suited to their aquatic ambush predatory style. However, basal members of the crocodylian line (e.g., Prestosuchus) were terrestrial predators with plesiomorphically tall skulls, and thus the origin of modern crocodylians involved a substantial reorganization of the feeding apparatus and its jaw muscles. Here, we reconstruct jaw muscles across a phylogenetic range of crocodylians and fossil suchians to investigate the impact of skull flattening on muscle anatomy. We used imaging data to create 3D models of extant and fossil suchians that demonstrate the evolution of the crocodylian skull, using osteological correlates to reconstruct muscle attachment sites. We found that jaw muscle anatomy in early fossil suchians reflected the ancestral archosaur condition but experienced progressive shifts in the lineage leading to Metasuchia. In early fossil suchians, musculus adductor mandibulae posterior and musculus pterygoideus (mPT) were of comparable size, but by Metasuchia, the jaw musculature is dominated by mPT. As predicted, we found that taxa with flatter skulls have less efficient muscle orientations for the production of high bite force. This study highlights the diversity and evolution of jaw muscles in one of the great transformations in vertebrate evolution.Fil: Sellers, Kaleb C.. University of Missouri; Estados UnidosFil: Nieto, Mauro Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Degrange, Federico Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Pol, Diego. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Clark, James M.. The George Washington University. Columbian College Of Arts And Sciences. Department Of Biological Sciences.; Estados UnidosFil: Middleton, Kevin M.. University of Missouri; Estados UnidosFil: Holliday, Casey M.. University of Missouri; Estados UnidosWiley-liss, div John Wiley & Sons Inc.2022-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/216728Sellers, Kaleb C.; Nieto, Mauro Nicolas; Degrange, Federico Javier; Pol, Diego; Clark, James M.; et al.; The effects of skull flattening on suchian jaw muscle evolution; Wiley-liss, div John Wiley & Sons Inc.; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 305; 10; 6-2022; 2791-28221932-8486CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/ar.24912info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:26Zoai:ri.conicet.gov.ar:11336/216728instacron: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 10:01:26.983CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The effects of skull flattening on suchian jaw muscle evolution |
title |
The effects of skull flattening on suchian jaw muscle evolution |
spellingShingle |
The effects of skull flattening on suchian jaw muscle evolution Sellers, Kaleb C. BIOMECHANICS CROCODYLIA JAW MUSCLES SKULL |
title_short |
The effects of skull flattening on suchian jaw muscle evolution |
title_full |
The effects of skull flattening on suchian jaw muscle evolution |
title_fullStr |
The effects of skull flattening on suchian jaw muscle evolution |
title_full_unstemmed |
The effects of skull flattening on suchian jaw muscle evolution |
title_sort |
The effects of skull flattening on suchian jaw muscle evolution |
dc.creator.none.fl_str_mv |
Sellers, Kaleb C. Nieto, Mauro Nicolas Degrange, Federico Javier Pol, Diego Clark, James M. Middleton, Kevin M. Holliday, Casey M. |
author |
Sellers, Kaleb C. |
author_facet |
Sellers, Kaleb C. Nieto, Mauro Nicolas Degrange, Federico Javier Pol, Diego Clark, James M. Middleton, Kevin M. Holliday, Casey M. |
author_role |
author |
author2 |
Nieto, Mauro Nicolas Degrange, Federico Javier Pol, Diego Clark, James M. Middleton, Kevin M. Holliday, Casey M. |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
BIOMECHANICS CROCODYLIA JAW MUSCLES SKULL |
topic |
BIOMECHANICS CROCODYLIA JAW MUSCLES SKULL |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Jaw muscles are key features of the vertebrate feeding apparatus. The jaw musculature is housed in the skull whose morphology reflects a compromise between multiple functions, including feeding, housing sensory structures, and defense, and the skull constrains jaw muscle geometry. Thus, jaw muscle anatomy may be suboptimally oriented for the production of bite force. Crocodylians are a group of vertebrates that generate the highest bite forces ever measured with a flat skull suited to their aquatic ambush predatory style. However, basal members of the crocodylian line (e.g., Prestosuchus) were terrestrial predators with plesiomorphically tall skulls, and thus the origin of modern crocodylians involved a substantial reorganization of the feeding apparatus and its jaw muscles. Here, we reconstruct jaw muscles across a phylogenetic range of crocodylians and fossil suchians to investigate the impact of skull flattening on muscle anatomy. We used imaging data to create 3D models of extant and fossil suchians that demonstrate the evolution of the crocodylian skull, using osteological correlates to reconstruct muscle attachment sites. We found that jaw muscle anatomy in early fossil suchians reflected the ancestral archosaur condition but experienced progressive shifts in the lineage leading to Metasuchia. In early fossil suchians, musculus adductor mandibulae posterior and musculus pterygoideus (mPT) were of comparable size, but by Metasuchia, the jaw musculature is dominated by mPT. As predicted, we found that taxa with flatter skulls have less efficient muscle orientations for the production of high bite force. This study highlights the diversity and evolution of jaw muscles in one of the great transformations in vertebrate evolution. Fil: Sellers, Kaleb C.. University of Missouri; Estados Unidos Fil: Nieto, Mauro Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Degrange, Federico Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Pol, Diego. Museo Paleontológico Egidio Feruglio; Argentina Fil: Clark, James M.. The George Washington University. Columbian College Of Arts And Sciences. Department Of Biological Sciences.; Estados Unidos Fil: Middleton, Kevin M.. University of Missouri; Estados Unidos Fil: Holliday, Casey M.. University of Missouri; Estados Unidos |
description |
Jaw muscles are key features of the vertebrate feeding apparatus. The jaw musculature is housed in the skull whose morphology reflects a compromise between multiple functions, including feeding, housing sensory structures, and defense, and the skull constrains jaw muscle geometry. Thus, jaw muscle anatomy may be suboptimally oriented for the production of bite force. Crocodylians are a group of vertebrates that generate the highest bite forces ever measured with a flat skull suited to their aquatic ambush predatory style. However, basal members of the crocodylian line (e.g., Prestosuchus) were terrestrial predators with plesiomorphically tall skulls, and thus the origin of modern crocodylians involved a substantial reorganization of the feeding apparatus and its jaw muscles. Here, we reconstruct jaw muscles across a phylogenetic range of crocodylians and fossil suchians to investigate the impact of skull flattening on muscle anatomy. We used imaging data to create 3D models of extant and fossil suchians that demonstrate the evolution of the crocodylian skull, using osteological correlates to reconstruct muscle attachment sites. We found that jaw muscle anatomy in early fossil suchians reflected the ancestral archosaur condition but experienced progressive shifts in the lineage leading to Metasuchia. In early fossil suchians, musculus adductor mandibulae posterior and musculus pterygoideus (mPT) were of comparable size, but by Metasuchia, the jaw musculature is dominated by mPT. As predicted, we found that taxa with flatter skulls have less efficient muscle orientations for the production of high bite force. This study highlights the diversity and evolution of jaw muscles in one of the great transformations in vertebrate evolution. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-06 |
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/11336/216728 Sellers, Kaleb C.; Nieto, Mauro Nicolas; Degrange, Federico Javier; Pol, Diego; Clark, James M.; et al.; The effects of skull flattening on suchian jaw muscle evolution; Wiley-liss, div John Wiley & Sons Inc.; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 305; 10; 6-2022; 2791-2822 1932-8486 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/216728 |
identifier_str_mv |
Sellers, Kaleb C.; Nieto, Mauro Nicolas; Degrange, Federico Javier; Pol, Diego; Clark, James M.; et al.; The effects of skull flattening on suchian jaw muscle evolution; Wiley-liss, div John Wiley & Sons Inc.; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 305; 10; 6-2022; 2791-2822 1932-8486 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ar.24912 |
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 |
dc.publisher.none.fl_str_mv |
Wiley-liss, div John Wiley & Sons Inc. |
publisher.none.fl_str_mv |
Wiley-liss, div John Wiley & Sons Inc. |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.13397 |