Araripina region (general): Late/Upper Aptian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Compsognathidae
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? Compsognathidae indet.
Cope 1871
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1 individual | |||||||||
| (1 measurement) | ||||||||||
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= Compsognathinae indet.
Nopcsa 1923
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Rauhut 2003 | |||||||||
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= Mirischia asymmetrica n. gen., n. sp.
Naish et al. 2004
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Naish et al. 2004 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | Pernambuco |
| Coordinates: | 7.6° South, 40.6° West (view map) | ||
| Paleocoordinates: | 9.0° South, 8.9° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Altitude: | 616 meters | ||
| Geographic resolution: | local area |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| 10 m.y. bin: | Cretaceous 2-3 | ||
| *Period: | Early/Lower Cretaceous | ||
| *International age/stage: | Albian | ||
| Key time interval: | Late/Upper Aptian | ||
| Age range of interval: | 119.50000 - 113.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Santana | Formation: | Romualdo | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: described as "Albian?"
From Melo et al. 2020: In summary, this integrated study of foraminifera, ostracodes and other microfossil data from the Romualdo Formation indicates that the local Alagoas Stage (Ostracoda Zone RT-011) can now be constrained to the Aptian. Arai and Assine 2020 also support that the Romualdo Formation is entirely Aptian in age. | |||||
Lithology and environment
| Primary lithology: | gray,green silty mudstone |
| Secondary lithology: | planar lamination,concretionary "limestone" |
| Includes fossils? | Y |
| Lithology description: "The Romualdo Member comprises a series of greyish-green silty mudtsones with bands of lenticular, ostracod-rich limestones and laminated carbonate concretions, the latter usually containing vertebrate fossils." Fossil here found in a "flat, finely laminated carbonate concretion." | |
| Environment: | lagoonal/restricted shallow subtidal |
| Geology comments: "brackish or quasi-marine conditions. It represents either a lagoonal setting or a basin with only restricted connections to waters of normal marine salinity." | |
Taphonomy
| Modes of preservation: | body,soft parts |
| Lagerst�tten type: | conservation |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | none |
| Associated major elements: | all |
| Disassociated major elements: | none |
| Disassociated minor elements: | none |
| Fragmentation: | none |
| Encrustation: | none |
| Temporal resolution: | snapshot |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 28050 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2003-01-22 10:18:42 | Last modified: | 2023-11-06 14:00:20 |
| Access level: | the public | Released: | 2003-01-22 10:18:42 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7682. | D. M. Martill, E. Frey, H.-D. Sues and A. R. I. Cruickshank. 2000. Skeletal remains of a small theropod dinosaur with associated soft structures from the Lower Cretaceous Santana Formation of northeastern Brazil. Canadian Journal of Earth Sciences 37(6):891-900 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 13838 | ETE | A. W. A. Kellner and D. d. A. Campos. 2000. Brief review of dinosaur studies and perspectives in Brazil. Anais da Academia Brasileira de Ciências 72(4):509-538 [M. Carrano/M. Carrano/M. Carrano] |
| 11791 | ETE | D. Naish, D. M. Martill, and E. Frey. 2004. Ecology, systematics, and biogeographic relationships of dinosaurs, including a new theropod, from the Santana Formation (?Albian, Early Cretaceous) of Brazil. Historical Biology 2004:1-14 [M. Carrano/M. Carrano/M. Carrano] |
| 24190 | ETE | O. W. M. Rauhut. 2003. The interrelationships and evolution of basal theropod dinosaurs. Special Papers in Palaeontology 69:1-213 [M. Carrano/M. Carrano] |
| 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] |