Palmeirais (PB 190): Cisuralian, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Osteichthyes indet.
(Huxley 1880)
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| Uncatalogued 'fish hash' (disarticulated scales, teeth, elements) | ||||||||||
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Reptilia
- Captorhinidae
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Captorhinikos sp.
Olson 1954
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| MAP PV855 (right dentary) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil |
| Coordinates: | 5.5° South, 42.9° West (view map) |
| Paleocoordinates: | 29.9° South, 12.3° West |
| Basis of coordinate: | estimated from map |
Time
| Period: | Permian | Epoch: | Cisuralian |
| 10 m.y. bin: | Permian 1-2 | ||
| Key time interval: | Cisuralian | ||
| Age range of interval: | 298.90000 - 273.01000 m.y. ago |
Stratigraphy
| Formation: | Pedra de Fogo |
Lithology and environment
| Primary lithology: | massive,desiccation cracks,brown lithified mudstone |
| Secondary lithology: | fine lithified sandstone |
| Includes fossils? | Y |
| Lithology description: The captorhinids from the quarry site PB190 were preserved in a massively-bedded light-brown mudstone containing randomly orientated claystone chips within the upper wavy-laminated part of the lacustrine facies. Further along strike, this facies displays sand-filled polygonal mudcracks associated with algal mounds and gypsum blade casts. In places, the fossiliferous interval has been incised by a series of 5–10 m wide channels filled with climbing ripple cross-laminated fine-grained sandstone. | |
| Environment: | terrestrial indet. |
| Geology comments: "...where the new captorhinids were found, suggests a more terrestrial depositional environment in that area, with marginal lacustrine facies still present but with more floodplain and fluvial channel deposits than in the southern and western parts of the basin." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Disassociated minor elements: | some |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: All specimens were recovered at quarries along the PI-130 highway, where silicified claystone blocks are extracted for use as construction material in Teresina and neighbouring cities. | |
Metadata
| Database number: | 218110 | ||
| Authorizer: | B. Gee | Enterer: | B. Gee |
| Modifier: | B. Gee | Research group: | vertebrate |
| Created: | 2021-02-18 15:37:03 | Last modified: | 2021-02-18 19:18:31 |
| Access level: | the public | Released: | 2021-02-18 15:37:03 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 75639. | J. C. Cisneros, K. Angielczyk, C. F. Kammerer, R. M. H. Smith, J. Fröbisch, C. A. Marsicano, and M. Richter. 2020. Captorhinid reptiles from the lower Permian Pedra de Fogo Formation, Piauí, Brazil: the earliest herbivorous tetrapods in Gondwana. PeerJ 8:e8719 [B. Gee/B. Gee/B. Gee] |