A New Specimen of the Genus Octodontobradys (Orophodontidae, Octodontobradyinae) From the Late Miocene-Pliocene of the Southwestern Amazon Basin, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , |
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. |
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Anuário do Instituto de Geociências (Online) |
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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 |