Neogene sharks and rays from the Brazilian 'Blue Amazon'
| Autor: | Orangel Aguilera, Cassiano Monteiro-Neto, Jorge D. Carrillo-Briceño, Ana Paula Linhares, Kamilla Borges Amorim, Marcia Reis Polck Marcia Reis Polck, Maria de Lourdes Ruivo Maria de Lourdes Ruivo, Zoneibe Luz, Peter Mann de Toledo, Torsten Vennemann, LaÂszlo Kocsis LaÂszlo Kocsis, Afonso César Rodrigues Nogueira, Heloisa Moraes-Santos |
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| Přispěvatelé: | University of Zurich, Luz, Zoneibe |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Teeth
Range (biology) Fauna Carbonates lcsh:Medicine 10125 Paleontological Institute and Museum 010502 geochemistry & geophysics 01 natural sciences Medicine and Health Sciences Skates Fish lcsh:Science Chondrichthyes Holocene Marine Fossils Multidisciplinary Ecology biology Fossils Fishes Geology Miocene Epoch Chemistry Geography 560 Fossils & prehistoric life Tropical marine climate Vertebrates Physical Sciences Anatomy Brazil Research Article Aetomylaeus 010506 paleontology 1100 General Agricultural and Biological Sciences Neogene 1300 General Biochemistry Genetics and Molecular Biology Animals 0105 earth and related environmental sciences 1000 Multidisciplinary Ecology and Environmental Sciences lcsh:R Organisms Chemical Compounds Biology and Life Sciences Paleontology Geologic Time biology.organism_classification Jaw Neogene Period Carcharhinus Sharks Earth Sciences Cenozoic Era Paleoecology lcsh:Q Paleobiology Digestive System Head Elasmobranchii |
| Zdroj: | PLoS ONE, Vol 12, Iss 8, p e0182740 (2017) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | 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 elasmobranch 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. |
| Databáze: | OpenAIRE |
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