Neogene sharks and rays from the Brazilian ‘Blue Amazon’
The lower Miocene Pirabas Formation in the North of Brazil was deposited under influence of the proto-Amazon River and is characterized by large changes in the ecological niches from the early Miocene onwards. To evaluate these ecological changes, the asmobranch fauna of the fully marine, carbonate-...
| Autor principal: | Aguilera, Orangel Aguilera Orangel |
|---|---|
| Outros Autores: | Luz, Zoneibe Luz Zoneibe, Carrillo-Briceño, Jorge D. Carrillo-Briceño Jorge D., Kocsis, LaÂszlo Kocsis LaÂszloÂ, Vennemann, Torsten W. Vennemann Torsten W., Toledo, Peter Mann de Toledo Peter Mann de, Nogueira, Afonso Nogueira Afonso, Amorim, Kamilla Borges Amorim Kamilla Borges, Moraes-Santos, Heloísa Moraes-Santos Heloísa, Polck, Marcia Reis Polck Marcia Reis, Ruivo, Maria de Lourdes Ruivo Maria de Lourdes, Linhares, Ana Paula Linhares Ana Paula, Monteiro-Neto, Cassiano Monteiro-Neto Cassiano |
| Grau: | Artigo |
| Idioma: | por |
| Publicado em: |
Museu Paraense Emilio Goeldi
2018
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| Acesso em linha: |
http://repositorio.museu-goeldi.br/handle/mgoeldi/1256 |
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ir-mgoeldi-1256 |
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ir-mgoeldi-12562019-07-17T18:23:37Z Neogene sharks and rays from the Brazilian ‘Blue Amazon’ Tubarões e raias neogênicas da Amazônia Azul Aguilera, Orangel Aguilera Orangel Luz, Zoneibe Luz Zoneibe Carrillo-Briceño, Jorge D. Carrillo-Briceño Jorge D. Kocsis, LaÂszlo Kocsis LaÂszlo Vennemann, Torsten W. Vennemann Torsten W. Toledo, Peter Mann de Toledo Peter Mann de Nogueira, Afonso Nogueira Afonso Amorim, Kamilla Borges Amorim Kamilla Borges Moraes-Santos, Heloísa Moraes-Santos Heloísa Polck, Marcia Reis Polck Marcia Reis Ruivo, Maria de Lourdes Ruivo Maria de Lourdes Linhares, Ana Paula Linhares Ana Paula Monteiro-Neto, Cassiano Monteiro-Neto Cassiano Mioceno Ecologia marinha CNPQ::CIENCIAS EXATAS E DA TERRA The lower Miocene Pirabas Formation in the North of Brazil was deposited under influence of the proto-Amazon River and is characterized by large changes in the ecological niches from the early Miocene onwards. To evaluate these ecological changes, the asmobranch fauna of the fully marine, carbonate-rich beds was investigated. A diverse fauna with 24 taxa of sharks and rays was identified with the dominant groups being carcharhiniforms and myliobatiforms. This faunal composition is similar to other early Miocene assemblages from the proto-Carribbean bioprovince. However, the Pirabas Formation has unique features compared to the other localities; being the only Neogene fossil fish assemblage described from the Atlantic coast of Tropical Americas. Phosphate oxygen isotope composition of elasmobranch teeth served as proxies for paleotemperatures and paleoecology. The data are compatible with a predominantly tropical marine setting with recognized inshore and offshore habitats with some probable depth preferences (e.g., Aetomylaeus groups). Paleohabitat of taxa particularly found in the Neogene of the Americas (†Carcharhinus ackermannii, †Aetomylaeus cubensis) are estimated to have been principally coastal and shallow waters. Larger variation among the few analyzed modern selachians reflects a larger range for the isotopic composition of recent seawater compared to the early Miocene. This probably links to an increased influence of the Amazon River in the coastal regions during the Holocene. A Formação Miocénica de Pirabas no Norte do Brasil foi depositada sob influência do rio proto-amazônico e é caracterizada por grandes mudanças nos nichos ecológicos do início do Mioceno. Para avaliar essas mudanças ecológicas, investigou-se a fauna asmobrânquica de leitos ricos em carbono e totalmente marinhos. Uma fauna diversificada com 24 táxons de tubarões e raias foi identificada com os grupos dominantes sendo carcharhiniformes e myliobatiformes. Esta composição faunística é semelhante a outras assembléias miocênicas precoces da bioprovíncia proto-caribenha. No entanto, a Formação Pirabas tem características únicas em comparação com as outras localidades; sendo a única assembléia de peixes fósseis de Neógeno descrita a partir da costa atlântica das Américas Tropicais. A composição isotópica de oxigênio de fosfato de dentes de elasmobrânquios serviu como proxies para paleotemperaturas e paleoecologia. Os dados são compatíveis com um ambiente marinho predominantemente tropical com habitats costeiros e marítimos reconhecidos com alguns preferências prováveis de profundidade (por exemplo, grupos Aetomylaeus). Estima-se que os paleohabitats dos taxa particularmente encontrados no Neogene das Américas († Carcharhinus ackermannii, † Aetomylaeus cubensis) tenham sido principalmente águas costeiras e superficiais. A maior variação entre os poucos selachianos modernos analisados reflete um maior intervalo para a composição isotópica da água do mar recente em comparação com o início do Mioceno. Isso provavelmente está ligado a uma maior influência do rio Amazonas nas regiões costeiras durante o Holoceno. 2018-07-06T13:18:30Z 2018-06-21 2018-07-06T13:18:30Z 2017-08-23 Artigo de Periódico 1932-6203 http://repositorio.museu-goeldi.br/handle/mgoeldi/1256 por PLOS ONE Acesso Aberto application/pdf Museu Paraense Emilio Goeldi Brasil MPEG |
| institution |
Repositório Institucional - Museu Paraense Emílio Goeldi |
| collection |
RepositorioEmilioGoeldi |
| language |
por |
| topic |
Mioceno Ecologia marinha CNPQ::CIENCIAS EXATAS E DA TERRA |
| spellingShingle |
Mioceno Ecologia marinha CNPQ::CIENCIAS EXATAS E DA TERRA Aguilera, Orangel Aguilera Orangel Neogene sharks and rays from the Brazilian ‘Blue Amazon’ |
| topic_facet |
Mioceno Ecologia marinha CNPQ::CIENCIAS EXATAS E DA TERRA |
| description |
The lower Miocene Pirabas Formation in the North of Brazil was deposited under influence of the proto-Amazon River and is characterized by large changes in the ecological niches from the early Miocene onwards. To evaluate these ecological changes, the asmobranch fauna of the fully marine, carbonate-rich beds was investigated. A diverse fauna with 24 taxa of sharks and rays was identified with the dominant groups being carcharhiniforms and myliobatiforms. This faunal composition is similar to other early Miocene assemblages from the proto-Carribbean bioprovince. However, the Pirabas Formation has unique features compared to the other localities; being the only Neogene fossil fish assemblage described from the Atlantic coast of Tropical Americas. Phosphate oxygen isotope composition of elasmobranch teeth served as proxies for paleotemperatures and paleoecology. The data are compatible with a predominantly tropical marine setting with recognized inshore and offshore habitats with some
probable depth preferences (e.g., Aetomylaeus groups). Paleohabitat of taxa particularly found in the Neogene of the Americas (†Carcharhinus ackermannii, †Aetomylaeus cubensis) are estimated to have been principally coastal and shallow waters. Larger variation among the few analyzed modern selachians reflects a larger range for the isotopic composition of recent seawater compared to the early Miocene. This probably links to an increased influence of the Amazon River in the coastal regions during the Holocene. |
| format |
Artigo |
| author |
Aguilera, Orangel Aguilera Orangel |
| author2 |
Luz, Zoneibe Luz Zoneibe Carrillo-Briceño, Jorge D. Carrillo-Briceño Jorge D. Kocsis, LaÂszlo Kocsis LaÂszlo Vennemann, Torsten W. Vennemann Torsten W. Toledo, Peter Mann de Toledo Peter Mann de Nogueira, Afonso Nogueira Afonso Amorim, Kamilla Borges Amorim Kamilla Borges Moraes-Santos, Heloísa Moraes-Santos Heloísa Polck, Marcia Reis Polck Marcia Reis Ruivo, Maria de Lourdes Ruivo Maria de Lourdes Linhares, Ana Paula Linhares Ana Paula Monteiro-Neto, Cassiano Monteiro-Neto Cassiano |
| author2Str |
Luz, Zoneibe Luz Zoneibe Carrillo-Briceño, Jorge D. Carrillo-Briceño Jorge D. Kocsis, LaÂszlo Kocsis LaÂszlo Vennemann, Torsten W. Vennemann Torsten W. Toledo, Peter Mann de Toledo Peter Mann de Nogueira, Afonso Nogueira Afonso Amorim, Kamilla Borges Amorim Kamilla Borges Moraes-Santos, Heloísa Moraes-Santos Heloísa Polck, Marcia Reis Polck Marcia Reis Ruivo, Maria de Lourdes Ruivo Maria de Lourdes Linhares, Ana Paula Linhares Ana Paula Monteiro-Neto, Cassiano Monteiro-Neto Cassiano |
| title |
Neogene sharks and rays from the Brazilian ‘Blue Amazon’ |
| title_short |
Neogene sharks and rays from the Brazilian ‘Blue Amazon’ |
| title_full |
Neogene sharks and rays from the Brazilian ‘Blue Amazon’ |
| title_fullStr |
Neogene sharks and rays from the Brazilian ‘Blue Amazon’ |
| title_full_unstemmed |
Neogene sharks and rays from the Brazilian ‘Blue Amazon’ |
| title_sort |
neogene sharks and rays from the brazilian ‘blue amazon’ |
| publisher |
Museu Paraense Emilio Goeldi |
| publishDate |
2018 |
| url |
http://repositorio.museu-goeldi.br/handle/mgoeldi/1256 |
| _version_ |
1787135911494942720 |
| score |
11.755432 |