Atol Quarry (=CIMPOR quarry): Barremian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Actinopteri
- Clupeiformes
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Pseudoellimma gallae n. gen., n. sp.
De Figueiredo 2009
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Reptilia
- Testudines
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Atolchelys lepida n. gen., n. sp.
Romano et al. 2014
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Romano et al. 2014 | 1 individual | ||||||||
holotype and only known specimen UERJ.MC 24 | ||||||||||
see common names |
Geography
Country: | Brazil | State/province: | Alagoas | County: | SĂŁo Miguel dos Campos |
Coordinates: | 9.8° South, 36.1° West (view map) | ||||
Paleocoordinates: | 8.9° South, 3.2° West | ||||
Basis of coordinate: | based on political unit | ||||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
Stage: | Barremian | 10 m.y. bin: | Cretaceous 2 |
Key time interval: | Barremian | ||
Age range of interval: | 125.77000 - 121.40000 m.y. ago |
Stratigraphy
Formation: | Coqueiro Seco |
Stratigraphic resolution: | formation |
Lithology and environment
Primary lithology: | gray "shale" |
Includes fossils? | Y |
Environment: | lacustrine deltaic indet. |
Geology comments: Paleoenvironment—brackish lake with irregular inputs of marine water flow (Gallo and Coelho, 2008). |
Taphonomy
Modes of preservation: | adpression |
Degree of concentration: | dispersed |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | good |
Abundance in sediment: | rare |
Fragmentation: | occasional |
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | selective quarrying,chemical,mechanical,acetic |
Collection size: | 6 specimens |
Reason for describing collection: | taxonomic analysis |
Collection method comments: Repository: Paleozoological Collection of the Departamento de Zoologia of UERJ | |
Taxonomic list comments:Fossil fish assemblage includes coelacanths, holosteans, enchodontids, salmoniforms, gonorynchiforms, and clupeomorphs (Brito et al., 1988; Maffissoni, 2000, 2002; Gallo and Coelho, 2008). Also there are palynomorphs (Antonioli et al., 2004) and non-marine ostracods (Neto, 2005). |
Metadata
Database number: | 135830 | ||
Authorizer: | S. Peters, R. Benson | Enterer: | S. McMullen, R. Benson |
Modifier: | S. Peters | Research group: | vertebrate |
Created: | 2012-11-11 03:08:36 | Last modified: | 2016-07-16 16:27:56 |
Access level: | the public | Released: | 2012-11-11 03:08:36 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
43471. | F. J. De Figueiredo. 2009. A New Clupeiform Fish from the Lower Cretaceous (Barremian) of Sergipe-Alagoas Basin, Northeastern Brazil. Journal of Vertebrate Paleontology 29(4):993-1005 [S. Peters/S. McMullen] |
Secondary references:
52095 | P. S. R. Romano, V. Gallo, R. R. C. Ramos and L. Antonioli. 2014. Atolchelys lepida, a new side-necked turtle from the Early Cretaceous of Brazil and the age of crown Pleurodira. Biology Letters 10(20140290) [R. Benson/R. Benson] |