A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group
In the last three decades, records of tribosphenidan mammals from India, continental Africa, Madagascar and South America have challenged the notion of a strictly Laurasian distribution of the group during the Cretaceous. Here, we describe a lower premolar from the Late Cretaceous Adamantina Formati...
Guardado en:
| Autores principales: | , , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/107596 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC5990825&blobtype=pdf |
| Aporte de: |
| id |
I19-R120-10915-107596 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Naturales |
| spellingShingle |
Ciencias Naturales Cordeiro de Castro, Mariela Goin, Francisco Javier Ortiz Jaureguizar, Edgardo Vieytes, Emma Carolina Tsukui, Kaori Ramezani, Jahandar Batezelli, Alessandro Marsola, Júlio C. A. Langer, Max C. A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group |
| topic_facet |
Ciencias Naturales |
| description |
In the last three decades, records of tribosphenidan mammals from India, continental Africa, Madagascar and South America have challenged the notion of a strictly Laurasian distribution of the group during the Cretaceous. Here, we describe a lower premolar from the Late Cretaceous Adamantina Formation, São Paulo State, Brazil. It differs from all known fossil mammals, except for a putative eutherian from the same geologic unity and Deccanolestes hislopi, from the Maastrichtian of India. The incompleteness of the material precludes narrowing down its taxonomic attribution further than Tribosphenida, but it is larger than most coeval mammals and shows a thin layer of parallel crystallite enamel. The new taxon helps filling two major gaps in the fossil record: the paucity of Mesozoic mammals in more northern parts of South America and of tribosphenidans in the Cretaceous of that continent. In addition, high-precision U-Pb geochronology provided a post-Turonian maximal age (≤87.8 Ma) for the type stratum, which is overlain by the dinosaur-bearing Marília Formation, constraining the age of the Adamantina Formation at the site to late Coniacian–late Maastrichtian. This represents the first radioisotopic age for the Bauru Group, a key stratigraphic unit for the study of Cretaceous tetrapods in Gondwana. |
| format |
Articulo Articulo |
| author |
Cordeiro de Castro, Mariela Goin, Francisco Javier Ortiz Jaureguizar, Edgardo Vieytes, Emma Carolina Tsukui, Kaori Ramezani, Jahandar Batezelli, Alessandro Marsola, Júlio C. A. Langer, Max C. |
| author_facet |
Cordeiro de Castro, Mariela Goin, Francisco Javier Ortiz Jaureguizar, Edgardo Vieytes, Emma Carolina Tsukui, Kaori Ramezani, Jahandar Batezelli, Alessandro Marsola, Júlio C. A. Langer, Max C. |
| author_sort |
Cordeiro de Castro, Mariela |
| title |
A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group |
| title_short |
A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group |
| title_full |
A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group |
| title_fullStr |
A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group |
| title_full_unstemmed |
A Late Cretaceous mammal from Brazil and the first radioisotopic age for the Bauru Group |
| title_sort |
late cretaceous mammal from brazil and the first radioisotopic age for the bauru group |
| publishDate |
2018 |
| url |
http://sedici.unlp.edu.ar/handle/10915/107596 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC5990825&blobtype=pdf |
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Repositorios |
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1764820443365113856 |