Mata locality, Itapecuru-Mirim: Late/Upper Aptian - Middle Albian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Theropoda
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Theropoda indet.
Marsh 1881
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2 specimens | |||||||||
| teeth | ||||||||||
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Reptilia
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Dicraeosauridae indet.
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Carvalho and Avilla 2002 | 1 individual | ||||||||
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= Rebbachisauridae indet.
Bonaparte 1997
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Carvalho et al. 2003 | |||||||||
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= Amazonsaurus maranhensis n. gen., n. sp.
Carvalho et al. 2003
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Carvalho et al. 2003 | |||||||||
| MN 4555-V, 4556, 4558, 4559, 4560, 4562, 4564; UFRJ-DG 58-R/1, 2, 3, 4, 5, 6, 7 | ||||||||||
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Crocodylia indet.
(Owen 1842)
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Carvalho et al. 2003 | |||||||||
| teeth | ||||||||||
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= Neosuchia indet.
Clark 1988
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Cidade et al. 2019 | |||||||||
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Reptilia
- Testudines
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Chelonia indet.
(Latreille 1800)
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Carvalho et al. 2003 | |||||||||
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= Itapecuruemys amazonensis n. gen., n. sp.
Batista et al. 2021
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Batista et al. 2021 | |||||||||
| UFRJ DG 66-R, a partially preserved carapace and plastron | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | Maranhão | County: | Itapecuru-Mirim |
| Coordinates: | 3.4° South, 44.4° West (view map) | ||||
| Paleocoordinates: | 6.2° South, 13.7° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Key time interval: | Late/Upper Aptian - Middle Albian | ||
| Age range of interval: | 119.50000 - 106.20000 m.y. ago |
Stratigraphy
| Formation: | Itapecuru |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | lenticular,tabular,current ripples,fine sandstone |
| Secondary lithology: | planar lamination,red mudstone |
| Includes fossils? | Y |
| Lithology description: L2 lithofacies consists of "finely laminated reddish siltstones; some levels contain fluidization structures...interbedded with fine sandstones in which climbing ripples are observed. These layers display lenticular to tabular geometry, and carbonate levels occur in their upper portion." | |
| Environment: | fluvial-deltaic indet. |
| Geology comments: within a larger coarsening upward sequence interpreted as a fluvio-deltaic progradation in lacustrine conditions; at site, deposit is interpreted as "proximal fluvial mouthbar deposits". | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Associated major elements: | many |
| Fragmentation: | occasional |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | Amazonsaurus type site | ||
| Database number: | 67219 | ||
| Authorizer: | M. Carrano, E. Vlachos, P. Mannion | Enterer: | M. Carrano, P. Mannion, E. Vlachos |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2006-11-15 07:29:51 | Last modified: | 2023-11-09 14:14:00 |
| Access level: | the public | Released: | 2006-11-15 07:29:51 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 86387. | C. S. Ferreira, S. A. K. Azevedo, I. S. Carvalho, R. A. Gonçalves, and M. A. Vicalvi. 1992. Os fósseis da Formação Itapecuru [Fossil bones from the Itapecuru Formation]. 2o Simpósio sobre as Bacias Cretácicas Brasileiras, Rio Claro–São Paulo, 8 a 11/7/92. Resumos Expandidos 107-110 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 81710 | D. L. Batista, I. de Souza Carvalho, and M. S. Fuente. 2021. A new Cretaceous Pleurodira Pelomedusoides from the Lower Cretaceous of Parnaíba Basin, Brazil. Journal of South American Earth Sciences 105(102872) [E. Vlachos/E. Vlachos] | |
| 82647 | I. Carvalho and L. Avilla. 2002. A new sauropod from the Aptian-Albian of Brazil and its phylogenetic relationships. Journal of Vertebrate Paleontology 22(3 (suppl.)):42A [M. Carrano/M. Carrano] | |
| 19194 | ETE | I. d. S. Carvalho, L. d. S. Avilla, and L. Salgado. 2003. Amazonsaurus maranhensis gen. et sp. nov. (Sauropoda, Diplodocoidea) from the Lower Cretaceous (Aptian-Albian) of Brazil. Cretaceous Research 24:697-713 [M. Carrano/M. Carrano] |
| 19196 | ETE | I. d. S. Carvalho, L. d. S. Avilla, and L. Salgado. 2003. Nuevos restos de saurópodos en el Cretácico inferior de Brazil [New remains of sauropods in the Lower Cretaceous of Brazil]. Ameghiniana 40(4, suppl.):71R [M. Carrano/M. Carrano/M. Carrano] |
| 76628 | G. M. Cidade, D. Fortier, and A. S. Hsiou. 2019. The crocodylomorph fauna of the Cenozoic of South America and its evolutionary history: a review. Journal of South American Earth Sciences 90:392-411 [P. Mannion/P. Mannion] | |
| 86329 | T. B. Ribeiro, P. M. M. Brito, and P. V. L. G. Costa Pereira. 2023. The predominance of teeth in the non-avian dinosaur record from Cretaceous Brazil: a review. Historical Biology [M. Carrano/M. Carrano] |