Rio Cabeça, Santa Maria Homestead: Kungurian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Orodontiformes
- Orodontidae
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Orodus ipeunaensis n. sp.
Chahud et al. 2010
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Chondrichthyes
- Petalodontiformes
- Petalodontidae
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Itapyrodus punctatus
Silva Santos 1990
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Chondrichthyes
- Sphenacanthidae
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Sphenacanthus sanpauloensis n. sp.
Chahud et al. 2010
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| see common names | |||||||
Geography
| Country: | Brazil |
| Coordinates: | 22.4° South, 47.7° West (view map) |
| Paleocoordinates: | 42.1° South, 21.6° West |
| Basis of coordinate: | stated in text |
| Geographic resolution: | small collection |
Time
| Period: | Permian | Epoch: | Cisuralian |
| Stage: | Kungurian | 10 m.y. bin: | Permian 2 |
| Key time interval: | Kungurian | ||
| Age range of interval: | 283.50000 - 273.01000 m.y. ago |
Stratigraphy
| Formation: | Irati | Member: | Taquaral | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 9.5 cm thick bed at the base of the Taquaral Member. The fossiliferous bed lies in erosional disconformity upon sandstones of the Tatuí Formation, which are penetrated locally by irregular, narrow tubular ichnofossils filled by sediment from the fossiliferous bed. | |||||
Lithology and environment
| Primary lithology: | "cross stratification",gray lithified conglomeratic sandstone |
| Lithology description: Light gray to gray, fining-upward, cross-laminated conglomeratic sandstone with angular to rounded, abundant granules and rare pebbles of quartz and chert dispersed in a very fine to coarse sandy matrix. | |
| Environment: | lacustrine indet. |
| Geology comments: The environment of the Irati Formation is unclear - it lacks all typical marine fossil groups but has Mesosaurs so is likely freshwater (but could be highly restricted marine). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 51070 | ||
| Authorizer: | T. Olszewski | Enterer: | T. Olszewski |
| Modifier: | M. Clapham | Research group: | vertebrate |
| Created: | 2005-05-26 16:02:04 | Last modified: | 2022-05-16 21:38:14 |
| Access level: | the public | Released: | 2005-05-26 16:02:04 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 37531. | A. Chahud, T. R. Fairchild, and S. Petri. 2010. Chondrichthyans from the base of the Irati Formation (Early Permian, Paraná Basin), São Paulo, Brazil. Gondwana Research 18:528-537 [M. Clapham/M. Clapham] |