A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil

Autores
Pinheiro, André E. P.; Fortier, Daniel C.; Pol, Diego; Campos, Diógenes A.; Bergqvist, Lílian P.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A new small species of Eocaiman is described on the basis of three anterior left mandibular rami and one isolated tooth. The specimens came from the middle-upper Paleocene Itabora ́ı Basin (Rio de Janeiro State, Brazil; Itaboraian South American Land Mammal Age). The new taxon differs from the other two Eocaiman species, such as its small size, likely participation of the splenial in the mandibular symphysis, a reduced angle between the longitudinal axis of the symphysis and the mandibular ramus, and enlarged ninth and tenth dentary teeth (in addition to the large first and fourth dentary teeth). The participation of the splenial in the mandibular symphysis is a unique character among caimanines (with the only possible exception being Tsoabichi greenriverensis). The new taxon provides new information on the taxonomic and anatomical diversity of the genus Eocaiman, a taxon of prime importance to understand the evolutionary origins of caimans given its position as the basalmost member of Caimaninae. Furthermore, the new taxon has a relatively small body size in comparison with other species of Eocaiman, a case paralleled by other Itaboraian reptilian groups (e.g. snakes), suggesting that this ecosystem provides critical data to test the relationship between reptilian body size and climate.
Fil: Pinheiro, André E. P.. Universidade Federal do Rio de Janeiro. Departamento de Geologia. Laboratório de Macrofósseis; Brasil
Fil: Fortier, Daniel C.. Universidade Federal do Rio Grande do Sul; Brasil. Universidade Federal de Minas Gerais. Intituto de Geociências; Brasil
Fil: Pol, Diego. Museo Paleontológico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Campos, Diógenes A.. Museu de Ciências da Terra. Departamento Nacional de Produção Mineral; Brasil
Fil: Bergqvist, Lílian P.. Universidade Federal do Rio de Janeiro. Departamento de Geologia. Laboratório de Macrofósseis; Brasil
Materia
Crocodylia
Paleocene
Brazil
Evolution
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:11336/5404
Acceder
id CONICETDig_ed78eda0df1aca1d783023de98c0063a
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network_name_str CONICET Digital (CONICET)
spelling A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, BrazilPinheiro, André E. P.Fortier, Daniel C.Pol, DiegoCampos, Diógenes A.Bergqvist, Lílian P.CrocodyliaPaleoceneBrazilEvolutionhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A new small species of Eocaiman is described on the basis of three anterior left mandibular rami and one isolated tooth. The specimens came from the middle-upper Paleocene Itabora ́ı Basin (Rio de Janeiro State, Brazil; Itaboraian South American Land Mammal Age). The new taxon differs from the other two Eocaiman species, such as its small size, likely participation of the splenial in the mandibular symphysis, a reduced angle between the longitudinal axis of the symphysis and the mandibular ramus, and enlarged ninth and tenth dentary teeth (in addition to the large first and fourth dentary teeth). The participation of the splenial in the mandibular symphysis is a unique character among caimanines (with the only possible exception being Tsoabichi greenriverensis). The new taxon provides new information on the taxonomic and anatomical diversity of the genus Eocaiman, a taxon of prime importance to understand the evolutionary origins of caimans given its position as the basalmost member of Caimaninae. Furthermore, the new taxon has a relatively small body size in comparison with other species of Eocaiman, a case paralleled by other Itaboraian reptilian groups (e.g. snakes), suggesting that this ecosystem provides critical data to test the relationship between reptilian body size and climate.Fil: Pinheiro, André E. P.. Universidade Federal do Rio de Janeiro. Departamento de Geologia. Laboratório de Macrofósseis; BrasilFil: Fortier, Daniel C.. Universidade Federal do Rio Grande do Sul; Brasil. Universidade Federal de Minas Gerais. Intituto de Geociências; BrasilFil: Pol, Diego. Museo Paleontológico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Campos, Diógenes A.. Museu de Ciências da Terra. Departamento Nacional de Produção Mineral; BrasilFil: Bergqvist, Lílian P.. Universidade Federal do Rio de Janeiro. Departamento de Geologia. Laboratório de Macrofósseis; BrasilTaylor & Francis2013-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5404Pinheiro, André E. P.; Fortier, Daniel C.; Pol, Diego; Campos, Diógenes A.; Bergqvist, Lílian P.; A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil; Taylor & Francis; Historical Biology; 25; 3; 5-2013; 327-3370891-2963enginfo:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/08912963.2012.705838info:eu-repo/semantics/altIdentifier/doi/10.1080/08912963.2012.705838info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:34:56Zoai:ri.conicet.gov.ar:11336/5404instacron: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:34982025-11-12 09:34:56.718CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
title A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
spellingShingle A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
Pinheiro, André E. P.
Crocodylia
Paleocene
Brazil
Evolution
title_short A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
title_full A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
title_fullStr A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
title_full_unstemmed A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
title_sort A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil
dc.creator.none.fl_str_mv Pinheiro, André E. P.
Fortier, Daniel C.
Pol, Diego
Campos, Diógenes A.
Bergqvist, Lílian P.
author Pinheiro, André E. P.
author_facet Pinheiro, André E. P.
Fortier, Daniel C.
Pol, Diego
Campos, Diógenes A.
Bergqvist, Lílian P.
author_role author
author2 Fortier, Daniel C.
Pol, Diego
Campos, Diógenes A.
Bergqvist, Lílian P.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Crocodylia
Paleocene
Brazil
Evolution
topic Crocodylia
Paleocene
Brazil
Evolution
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A new small species of Eocaiman is described on the basis of three anterior left mandibular rami and one isolated tooth. The specimens came from the middle-upper Paleocene Itabora ́ı Basin (Rio de Janeiro State, Brazil; Itaboraian South American Land Mammal Age). The new taxon differs from the other two Eocaiman species, such as its small size, likely participation of the splenial in the mandibular symphysis, a reduced angle between the longitudinal axis of the symphysis and the mandibular ramus, and enlarged ninth and tenth dentary teeth (in addition to the large first and fourth dentary teeth). The participation of the splenial in the mandibular symphysis is a unique character among caimanines (with the only possible exception being Tsoabichi greenriverensis). The new taxon provides new information on the taxonomic and anatomical diversity of the genus Eocaiman, a taxon of prime importance to understand the evolutionary origins of caimans given its position as the basalmost member of Caimaninae. Furthermore, the new taxon has a relatively small body size in comparison with other species of Eocaiman, a case paralleled by other Itaboraian reptilian groups (e.g. snakes), suggesting that this ecosystem provides critical data to test the relationship between reptilian body size and climate.
Fil: Pinheiro, André E. P.. Universidade Federal do Rio de Janeiro. Departamento de Geologia. Laboratório de Macrofósseis; Brasil
Fil: Fortier, Daniel C.. Universidade Federal do Rio Grande do Sul; Brasil. Universidade Federal de Minas Gerais. Intituto de Geociências; Brasil
Fil: Pol, Diego. Museo Paleontológico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Campos, Diógenes A.. Museu de Ciências da Terra. Departamento Nacional de Produção Mineral; Brasil
Fil: Bergqvist, Lílian P.. Universidade Federal do Rio de Janeiro. Departamento de Geologia. Laboratório de Macrofósseis; Brasil
description A new small species of Eocaiman is described on the basis of three anterior left mandibular rami and one isolated tooth. The specimens came from the middle-upper Paleocene Itabora ́ı Basin (Rio de Janeiro State, Brazil; Itaboraian South American Land Mammal Age). The new taxon differs from the other two Eocaiman species, such as its small size, likely participation of the splenial in the mandibular symphysis, a reduced angle between the longitudinal axis of the symphysis and the mandibular ramus, and enlarged ninth and tenth dentary teeth (in addition to the large first and fourth dentary teeth). The participation of the splenial in the mandibular symphysis is a unique character among caimanines (with the only possible exception being Tsoabichi greenriverensis). The new taxon provides new information on the taxonomic and anatomical diversity of the genus Eocaiman, a taxon of prime importance to understand the evolutionary origins of caimans given its position as the basalmost member of Caimaninae. Furthermore, the new taxon has a relatively small body size in comparison with other species of Eocaiman, a case paralleled by other Itaboraian reptilian groups (e.g. snakes), suggesting that this ecosystem provides critical data to test the relationship between reptilian body size and climate.
publishDate 2013
dc.date.none.fl_str_mv 2013-05
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/11336/5404
Pinheiro, André E. P.; Fortier, Daniel C.; Pol, Diego; Campos, Diógenes A.; Bergqvist, Lílian P.; A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil; Taylor & Francis; Historical Biology; 25; 3; 5-2013; 327-337
0891-2963
url http://hdl.handle.net/11336/5404
identifier_str_mv Pinheiro, André E. P.; Fortier, Daniel C.; Pol, Diego; Campos, Diógenes A.; Bergqvist, Lílian P.; A new Eocaiman (Alligatoridae, Crocodylia) from the Itaboraí Basin, Paleogene of Rio de Janeiro, Brazil; Taylor & Francis; Historical Biology; 25; 3; 5-2013; 327-337
0891-2963
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/08912963.2012.705838
info:eu-repo/semantics/altIdentifier/doi/10.1080/08912963.2012.705838
info:eu-repo/semantics/altIdentifier/doi/
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 Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
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_ 1848597159693254656
score 12.976206

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