Atol Quarry (=CIMPOR quarry): Barremian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Actinopteri
- Clupeiformes
|
||||||||||
|
Pseudoellimma gallae n. gen., n. sp.
De Figueiredo 2009
|
||||||||||
|
Reptilia
- Testudines
|
||||||||||
|
Atolchelys lepida n. gen., n. sp.
Romano et al. 2014
|
Romano et al. 2014 | 1 individual | ||||||||
| holotype and only known specimen UERJ.MC 24 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | Alagoas | County: | São 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] |