Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia

Autores
Pol, Diego; Leardi, Juan Martín; Lecuona, Agustina; Krause, Javier Marcelo
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We describe postcranial remains of new specimens referred to Sebecus icaeorhinus found in the lower section of the Sarmiento Formation at Canad ˜ on Hondo (central Patagonia, Argentina), commonly regarded as part of the Casamay- ´ oran South American Land Mammal Age (middle Eocene). The new specimens include a partially articulated postcranium associated with teeth and fragmentary remains of the mandible that allows their identification as S. icaeorhinus. This taxon was almost exclusively known from skull remains from the same stratigraphic unit and was characterized by unique cranial features such as a long, high, and narrow rostrum bearing serrated teeth. The new material reveals numerous details on the postcranial anatomy of this crocodyliform, including the presence of proportionately long limbs and 10 autapomorphies in the vertebrae, forelimb, and pelvic girdle (some of which are interpreted as adaptations to terrestriality and an erect limb posture). These features depict a highly modified postcranial anatomy for S. icaeorhinus in comparison with that of neosuchian crocodyliforms, paralleling the uniqueness of its skull anatomy. The new information is also phylogenetically informative and incorporated into a cladistic analysis that corroborates not only the close affinities of Sebecidae with Baurusuchidae (sebecosuchian monophyly), but also the deeply nested position of this clade within Notosuchia. The incorporation of postcranial characters to the phylogenetic analysis also results in a novel arrangement of the basal mesoeucrocodylians recorded in the Cretaceous–Cenozoic of Gondwana, clustering all of these species into a large monophyletic clade.
Fil: Pol, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Leardi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Lecuona, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Krause, Javier Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Materia
SEBECUS ICAEORHINUS
CROCODYLIFORMES
EOCENE
PATAGONIA ARGENTINA
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:11336/272866
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of PatagoniaPol, DiegoLeardi, Juan MartínLecuona, AgustinaKrause, Javier MarceloSEBECUS ICAEORHINUSCROCODYLIFORMESEOCENEPATAGONIA ARGENTINAhttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1We describe postcranial remains of new specimens referred to Sebecus icaeorhinus found in the lower section of the Sarmiento Formation at Canad ˜ on Hondo (central Patagonia, Argentina), commonly regarded as part of the Casamay- ´ oran South American Land Mammal Age (middle Eocene). The new specimens include a partially articulated postcranium associated with teeth and fragmentary remains of the mandible that allows their identification as S. icaeorhinus. This taxon was almost exclusively known from skull remains from the same stratigraphic unit and was characterized by unique cranial features such as a long, high, and narrow rostrum bearing serrated teeth. The new material reveals numerous details on the postcranial anatomy of this crocodyliform, including the presence of proportionately long limbs and 10 autapomorphies in the vertebrae, forelimb, and pelvic girdle (some of which are interpreted as adaptations to terrestriality and an erect limb posture). These features depict a highly modified postcranial anatomy for S. icaeorhinus in comparison with that of neosuchian crocodyliforms, paralleling the uniqueness of its skull anatomy. The new information is also phylogenetically informative and incorporated into a cladistic analysis that corroborates not only the close affinities of Sebecidae with Baurusuchidae (sebecosuchian monophyly), but also the deeply nested position of this clade within Notosuchia. The incorporation of postcranial characters to the phylogenetic analysis also results in a novel arrangement of the basal mesoeucrocodylians recorded in the Cretaceous–Cenozoic of Gondwana, clustering all of these species into a large monophyletic clade.Fil: Pol, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Leardi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Lecuona, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaFil: Krause, Javier Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; ArgentinaSociety of Vertebrate Paleontology2012-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/272866Pol, Diego; Leardi, Juan Martín; Lecuona, Agustina; Krause, Javier Marcelo; Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 32; 2; 2-2012; 328-3540272-4634CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/02724634.2012.646833info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2012.646833info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:56:47Zoai:ri.conicet.gov.ar:11336/272866instacron: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:34982025-10-22 11:56:47.501CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
title Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
spellingShingle Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
Pol, Diego
SEBECUS ICAEORHINUS
CROCODYLIFORMES
EOCENE
PATAGONIA ARGENTINA
title_short Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
title_full Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
title_fullStr Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
title_full_unstemmed Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
title_sort Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia
dc.creator.none.fl_str_mv Pol, Diego
Leardi, Juan Martín
Lecuona, Agustina
Krause, Javier Marcelo
author Pol, Diego
author_facet Pol, Diego
Leardi, Juan Martín
Lecuona, Agustina
Krause, Javier Marcelo
author_role author
author2 Leardi, Juan Martín
Lecuona, Agustina
Krause, Javier Marcelo
author2_role author
author
author
dc.subject.none.fl_str_mv SEBECUS ICAEORHINUS
CROCODYLIFORMES
EOCENE
PATAGONIA ARGENTINA
topic SEBECUS ICAEORHINUS
CROCODYLIFORMES
EOCENE
PATAGONIA ARGENTINA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We describe postcranial remains of new specimens referred to Sebecus icaeorhinus found in the lower section of the Sarmiento Formation at Canad ˜ on Hondo (central Patagonia, Argentina), commonly regarded as part of the Casamay- ´ oran South American Land Mammal Age (middle Eocene). The new specimens include a partially articulated postcranium associated with teeth and fragmentary remains of the mandible that allows their identification as S. icaeorhinus. This taxon was almost exclusively known from skull remains from the same stratigraphic unit and was characterized by unique cranial features such as a long, high, and narrow rostrum bearing serrated teeth. The new material reveals numerous details on the postcranial anatomy of this crocodyliform, including the presence of proportionately long limbs and 10 autapomorphies in the vertebrae, forelimb, and pelvic girdle (some of which are interpreted as adaptations to terrestriality and an erect limb posture). These features depict a highly modified postcranial anatomy for S. icaeorhinus in comparison with that of neosuchian crocodyliforms, paralleling the uniqueness of its skull anatomy. The new information is also phylogenetically informative and incorporated into a cladistic analysis that corroborates not only the close affinities of Sebecidae with Baurusuchidae (sebecosuchian monophyly), but also the deeply nested position of this clade within Notosuchia. The incorporation of postcranial characters to the phylogenetic analysis also results in a novel arrangement of the basal mesoeucrocodylians recorded in the Cretaceous–Cenozoic of Gondwana, clustering all of these species into a large monophyletic clade.
Fil: Pol, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Leardi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Lecuona, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
Fil: Krause, Javier Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontológico Egidio Feruglio; Argentina
description We describe postcranial remains of new specimens referred to Sebecus icaeorhinus found in the lower section of the Sarmiento Formation at Canad ˜ on Hondo (central Patagonia, Argentina), commonly regarded as part of the Casamay- ´ oran South American Land Mammal Age (middle Eocene). The new specimens include a partially articulated postcranium associated with teeth and fragmentary remains of the mandible that allows their identification as S. icaeorhinus. This taxon was almost exclusively known from skull remains from the same stratigraphic unit and was characterized by unique cranial features such as a long, high, and narrow rostrum bearing serrated teeth. The new material reveals numerous details on the postcranial anatomy of this crocodyliform, including the presence of proportionately long limbs and 10 autapomorphies in the vertebrae, forelimb, and pelvic girdle (some of which are interpreted as adaptations to terrestriality and an erect limb posture). These features depict a highly modified postcranial anatomy for S. icaeorhinus in comparison with that of neosuchian crocodyliforms, paralleling the uniqueness of its skull anatomy. The new information is also phylogenetically informative and incorporated into a cladistic analysis that corroborates not only the close affinities of Sebecidae with Baurusuchidae (sebecosuchian monophyly), but also the deeply nested position of this clade within Notosuchia. The incorporation of postcranial characters to the phylogenetic analysis also results in a novel arrangement of the basal mesoeucrocodylians recorded in the Cretaceous–Cenozoic of Gondwana, clustering all of these species into a large monophyletic clade.
publishDate 2012
dc.date.none.fl_str_mv 2012-02
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/11336/272866
Pol, Diego; Leardi, Juan Martín; Lecuona, Agustina; Krause, Javier Marcelo; Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 32; 2; 2-2012; 328-354
0272-4634
CONICET Digital
CONICET
url http://hdl.handle.net/11336/272866
identifier_str_mv Pol, Diego; Leardi, Juan Martín; Lecuona, Agustina; Krause, Javier Marcelo; Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 32; 2; 2-2012; 328-354
0272-4634
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://www.tandfonline.com/doi/full/10.1080/02724634.2012.646833
info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2012.646833
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
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dc.publisher.none.fl_str_mv Society of Vertebrate Paleontology
publisher.none.fl_str_mv Society of Vertebrate Paleontology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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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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