Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina

Autores
García, Rodolfo Andrés; Cerda, Ignacio Alejandro
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Exceptionally preserved sauropod embryos from the Late Cretaceous  Anacleto Formation in Auca Mahuevo (Neuquén Province, Argentina), have provided fundamental information on titanosaurian ontogeny. This paper describes the dental composition and disposition as well as bone microstructure of the specimens. Embryonic teeth show size disparity, with lengths that vary from 1 to 3 mm, and  diameters ranging from 0.15 to 0.26 mm, the most frequent length values between 2.5 and 3 mm. Seemingly, a typical “pencil–like” teeth morphology, and a dental formula Pm 4, M 7-8 / D10? remained constant during titanosaurian ontogeny, whereas their arrangement in the skull shows notable ontogenetic changes. Absence of wear facet on teeth would indicate absence of pre–natal chewing movements. The enamel proportion is significantly higher in embryos than in mature titanosaurs, which suggests that this relation varies during ontogeny. Embryonic bony tissue is composed by a highly vascularized and cellular woven bone. Absence of osteonal tissue, high degree of vascularization, presence of numerous osteocytes and low development of periosteal bone reveal that the Auca Mahuevo titanosaurs would have had a high early growth rate, and they were not entombed in an advanced embryonic stage.
Fil: García, Rodolfo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Cerda, Ignacio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Materia
EMBRYOS
TITANOSAURIAN
HISTOLOGY
WEAR FACET
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
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oai:ri.conicet.gov.ar:11336/242422
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, ArgentinaGarcía, Rodolfo AndrésCerda, Ignacio AlejandroEMBRYOSTITANOSAURIANHISTOLOGYWEAR FACEThttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Exceptionally preserved sauropod embryos from the Late Cretaceous  Anacleto Formation in Auca Mahuevo (Neuquén Province, Argentina), have provided fundamental information on titanosaurian ontogeny. This paper describes the dental composition and disposition as well as bone microstructure of the specimens. Embryonic teeth show size disparity, with lengths that vary from 1 to 3 mm, and  diameters ranging from 0.15 to 0.26 mm, the most frequent length values between 2.5 and 3 mm. Seemingly, a typical “pencil–like” teeth morphology, and a dental formula Pm 4, M 7-8 / D10? remained constant during titanosaurian ontogeny, whereas their arrangement in the skull shows notable ontogenetic changes. Absence of wear facet on teeth would indicate absence of pre–natal chewing movements. The enamel proportion is significantly higher in embryos than in mature titanosaurs, which suggests that this relation varies during ontogeny. Embryonic bony tissue is composed by a highly vascularized and cellular woven bone. Absence of osteonal tissue, high degree of vascularization, presence of numerous osteocytes and low development of periosteal bone reveal that the Auca Mahuevo titanosaurs would have had a high early growth rate, and they were not entombed in an advanced embryonic stage.Fil: García, Rodolfo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Cerda, Ignacio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaWiley Blackwell Publishing, Inc2010-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/242422García, Rodolfo Andrés; Cerda, Ignacio Alejandro; Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; Palaeontology; 53; 2; 3-2010; 335-3460031-0239CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1111/j.1475-4983.2010.00937.xinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1475-4983.2010.00937.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 Técnicas2025-10-15T15:04:15Zoai:ri.conicet.gov.ar:11336/242422instacron: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 15:04:15.938CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
title Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
spellingShingle Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
García, Rodolfo Andrés
EMBRYOS
TITANOSAURIAN
HISTOLOGY
WEAR FACET
title_short Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
title_full Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
title_fullStr Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
title_full_unstemmed Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
title_sort Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina
dc.creator.none.fl_str_mv García, Rodolfo Andrés
Cerda, Ignacio Alejandro
author García, Rodolfo Andrés
author_facet García, Rodolfo Andrés
Cerda, Ignacio Alejandro
author_role author
author2 Cerda, Ignacio Alejandro
author2_role author
dc.subject.none.fl_str_mv EMBRYOS
TITANOSAURIAN
HISTOLOGY
WEAR FACET
topic EMBRYOS
TITANOSAURIAN
HISTOLOGY
WEAR FACET
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Exceptionally preserved sauropod embryos from the Late Cretaceous  Anacleto Formation in Auca Mahuevo (Neuquén Province, Argentina), have provided fundamental information on titanosaurian ontogeny. This paper describes the dental composition and disposition as well as bone microstructure of the specimens. Embryonic teeth show size disparity, with lengths that vary from 1 to 3 mm, and  diameters ranging from 0.15 to 0.26 mm, the most frequent length values between 2.5 and 3 mm. Seemingly, a typical “pencil–like” teeth morphology, and a dental formula Pm 4, M 7-8 / D10? remained constant during titanosaurian ontogeny, whereas their arrangement in the skull shows notable ontogenetic changes. Absence of wear facet on teeth would indicate absence of pre–natal chewing movements. The enamel proportion is significantly higher in embryos than in mature titanosaurs, which suggests that this relation varies during ontogeny. Embryonic bony tissue is composed by a highly vascularized and cellular woven bone. Absence of osteonal tissue, high degree of vascularization, presence of numerous osteocytes and low development of periosteal bone reveal that the Auca Mahuevo titanosaurs would have had a high early growth rate, and they were not entombed in an advanced embryonic stage.
Fil: García, Rodolfo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Cerda, Ignacio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
description Exceptionally preserved sauropod embryos from the Late Cretaceous  Anacleto Formation in Auca Mahuevo (Neuquén Province, Argentina), have provided fundamental information on titanosaurian ontogeny. This paper describes the dental composition and disposition as well as bone microstructure of the specimens. Embryonic teeth show size disparity, with lengths that vary from 1 to 3 mm, and  diameters ranging from 0.15 to 0.26 mm, the most frequent length values between 2.5 and 3 mm. Seemingly, a typical “pencil–like” teeth morphology, and a dental formula Pm 4, M 7-8 / D10? remained constant during titanosaurian ontogeny, whereas their arrangement in the skull shows notable ontogenetic changes. Absence of wear facet on teeth would indicate absence of pre–natal chewing movements. The enamel proportion is significantly higher in embryos than in mature titanosaurs, which suggests that this relation varies during ontogeny. Embryonic bony tissue is composed by a highly vascularized and cellular woven bone. Absence of osteonal tissue, high degree of vascularization, presence of numerous osteocytes and low development of periosteal bone reveal that the Auca Mahuevo titanosaurs would have had a high early growth rate, and they were not entombed in an advanced embryonic stage.
publishDate 2010
dc.date.none.fl_str_mv 2010-03
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/11336/242422
García, Rodolfo Andrés; Cerda, Ignacio Alejandro; Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; Palaeontology; 53; 2; 3-2010; 335-346
0031-0239
CONICET Digital
CONICET
url http://hdl.handle.net/11336/242422
identifier_str_mv García, Rodolfo Andrés; Cerda, Ignacio Alejandro; Dentition and histology in titanosaurian dinosaur embryos from Upper Cretaceous of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; Palaeontology; 53; 2; 3-2010; 335-346
0031-0239
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/full/10.1111/j.1475-4983.2010.00937.x
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1475-4983.2010.00937.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
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
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score 13.22299

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