A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil

Detalhes bibliográficos
Autor(a) principal: Guilherme, Edson
Data de Publicação: 2011
Outros Autores: Bocquentin, Jean, Porto, Alice S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Anuário do Instituto de Geociências (Online)
Texto Completo: https://revistas.ufrj.br/index.php/aigeo/article/view/6821
Resumo: This study presents an almost complete mandible of Octodontobradys sp. from the late Miocene-Pliocene of the Solimões Formation from a locality on the border between Brazil and Bolivia, in southwestern Amazonia. The two almost complete mandibular rami, together with fragments of fossils from other taxa, were found on the left bank of the Abunã River, upriver from the town of Plácido de Castro, in the Brazilian state of Acre. The form of the symphyseal region of the mandible, and the elongated and bilobated outline of the alveoli of the m2-3-4 molariforms place the specimen clearly in the genus Octodontobradys. However, the new specimen differs from O. puruensis in (a) the anterior position of the posterior external aperture of the mandibular canal, and (b) the wider and more anteriorly inclined symphyseal region. The mandible described here represents the first specimen of the genus Octodontobradys found outside of the holotype locality, Talismã, in the Brazilian state of Amazonas and enabled us to emend the diagnoses of Subfamily Octodontobradyinae.
id UFRJ-21_c24658fde3d4227d11810d5e012736fb
oai_identifier_str oai:www.revistas.ufrj.br:article/6821
network_acronym_str UFRJ-21
network_name_str Anuário do Instituto de Geociências (Online)
repository_id_str
spelling A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, BrazilUm Novo Espécime do Gênero Octodontobradys (Orophodontidae, Octodontobradyinae) do Mioceno Superior/Plioceno da Amazônia Sul-Ocidental, BrasilThis study presents an almost complete mandible of Octodontobradys sp. from the late Miocene-Pliocene of the Solimões Formation from a locality on the border between Brazil and Bolivia, in southwestern Amazonia. The two almost complete mandibular rami, together with fragments of fossils from other taxa, were found on the left bank of the Abunã River, upriver from the town of Plácido de Castro, in the Brazilian state of Acre. The form of the symphyseal region of the mandible, and the elongated and bilobated outline of the alveoli of the m2-3-4 molariforms place the specimen clearly in the genus Octodontobradys. However, the new specimen differs from O. puruensis in (a) the anterior position of the posterior external aperture of the mandibular canal, and (b) the wider and more anteriorly inclined symphyseal region. The mandible described here represents the first specimen of the genus Octodontobradys found outside of the holotype locality, Talismã, in the Brazilian state of Amazonas and enabled us to emend the diagnoses of Subfamily Octodontobradyinae.Apresenta-se aqui uma mandíbula quase completa de Octodontobradys sp., proveniente do Mioceno superior/Plioceno da Formação Solimões, na fronteira Brasil/Bolívia, sudoeste da Amazônia. Os dois ramos mandibulares quase completos além de outros fragmentos fósseis pertencentes a diferentes táxons foram encontrados na margem esquerda do rio Abunã à montante da cidade de Plácido de Castro, Estado do Acre, Brasil. A forma da região sinfisiária da mandíbula e o contorno alongado e bilobado dos alvéolos dos molariformes m2-3-4 não deixa dúvida de que este novo espécime pertence ao gênero Octodontobradys. Octodontobradys sp difere de O. puruensis pelos seguintes caracteres: (a) abertura do canal mandibular posterior externo situado mais anteriormente e (b) região sinfisiária mais ampla e inclinada anteriormente. A mandíbula descrita aqui representa o primeiro achado de material pertecente ao gênero Octodontobradys fora do sítio Talismã, no Estado do Amazonas, de onde provém o holótipo deste táxon e nos permitiu ampliar a diagnose da Subfamília Octodontobradyinae.Universidade Federal do Rio de Janeiro2011-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/682110.11137/2011_2_38-45Anuário do Instituto de Geociências; Vol 34, No 2 (2011); 38-45Anuário do Instituto de Geociências; Vol 34, No 2 (2011); 38-451982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJenghttps://revistas.ufrj.br/index.php/aigeo/article/view/6821/5418Copyright (c) 2011 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessGuilherme, EdsonBocquentin, JeanPorto, Alice S.2017-01-23T21:52:40Zoai:www.revistas.ufrj.br:article/6821Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2017-01-23T21:52:40Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.none.fl_str_mv A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
Um Novo Espécime do Gênero Octodontobradys (Orophodontidae, Octodontobradyinae) do Mioceno Superior/Plioceno da Amazônia Sul-Ocidental, Brasil
title A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
spellingShingle A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
Guilherme, Edson
title_short A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
title_full A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
title_fullStr A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
title_full_unstemmed A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
title_sort A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
author Guilherme, Edson
author_facet Guilherme, Edson
Bocquentin, Jean
Porto, Alice S.
author_role author
author2 Bocquentin, Jean
Porto, Alice S.
author2_role author
author
dc.contributor.author.fl_str_mv Guilherme, Edson
Bocquentin, Jean
Porto, Alice S.
description This study presents an almost complete mandible of Octodontobradys sp. from the late Miocene-Pliocene of the Solimões Formation from a locality on the border between Brazil and Bolivia, in southwestern Amazonia. The two almost complete mandibular rami, together with fragments of fossils from other taxa, were found on the left bank of the Abunã River, upriver from the town of Plácido de Castro, in the Brazilian state of Acre. The form of the symphyseal region of the mandible, and the elongated and bilobated outline of the alveoli of the m2-3-4 molariforms place the specimen clearly in the genus Octodontobradys. However, the new specimen differs from O. puruensis in (a) the anterior position of the posterior external aperture of the mandibular canal, and (b) the wider and more anteriorly inclined symphyseal region. The mandible described here represents the first specimen of the genus Octodontobradys found outside of the holotype locality, Talismã, in the Brazilian state of Amazonas and enabled us to emend the diagnoses of Subfamily Octodontobradyinae.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://revistas.ufrj.br/index.php/aigeo/article/view/6821
10.11137/2011_2_38-45
url https://revistas.ufrj.br/index.php/aigeo/article/view/6821
identifier_str_mv 10.11137/2011_2_38-45
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://revistas.ufrj.br/index.php/aigeo/article/view/6821/5418
dc.rights.driver.fl_str_mv Copyright (c) 2011 Anuário do Instituto de Geociências
http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2011 Anuário do Instituto de Geociências
http://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
dc.source.none.fl_str_mv Anuário do Instituto de Geociências; Vol 34, No 2 (2011); 38-45
Anuário do Instituto de Geociências; Vol 34, No 2 (2011); 38-45
1982-3908
0101-9759
reponame:Anuário do Instituto de Geociências (Online)
instname:Universidade Federal do Rio de Janeiro (UFRJ)
instacron:UFRJ
instname_str Universidade Federal do Rio de Janeiro (UFRJ)
instacron_str UFRJ
institution UFRJ
reponame_str Anuário do Instituto de Geociências (Online)
collection Anuário do Instituto de Geociências (Online)
repository.name.fl_str_mv Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)
repository.mail.fl_str_mv anuario@igeo.ufrj.br||
_version_ 1797053544374730752

Registros relacionados