Sierra El Jabalí, next to Gomez Farías: Late/Upper Kimmeridgian, Mexico
collected by teams from the SEP and MUDE 1999-2005
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Plesiosauria
- Pliosauridae
|
||||||||||
|
Pliosauridae indet.
Seeley 1874
|
Frey and Stinnesbeck 2014 | 2 specimens | ||||||||
| MUDE CPC 226, 228 | ||||||||||
|
Reptilia
- Plesiosauria
- Elasmosauridae
|
||||||||||
|
Elasmosauridae indet.
Cope 1869
|
Frey and Stinnesbeck 2014 | 8 specimens | ||||||||
| MUDE CPC 202–204, 206–207; 8 cervical centra | ||||||||||
|
Reptilia
- Metriorhynchidae
|
||||||||||
|
Cricosaurus saltillensis
(Buchy et al. 2006)
|
Buchy et al. 2013 | 1 specimen | ||||||||
| MUDE CPC 487: Partial cranium and mandible with teeth, atlas-axis and four cervical vertebrae and ribs | ||||||||||
|
Reptilia
- Ophthalmosauridae
|
||||||||||
|
Ophthalmosaurus cf. icenicus
Seeley 1874
|
1 individual | |||||||||
| CPC 238 (formerly CEP 1876) | ||||||||||
|
= Jabalisaurus meztli n. gen., n. sp.
Barrientos-Lara and Alvarado-Ortega 2021
|
Barrientos-Lara and Alvarado-Ortega 2021 | |||||||||
| Holotype: CPC 238, fragmentary skull, pectoral girdle, and right forefin | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Coahuila |
| Coordinates: | 25.0° North, 101.0° West (view map) | ||
| Paleocoordinates: | 20.0° North, 51.5° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| Stage: | Kimmeridgian | 10 m.y. bin: | Jurassic 5 |
| Key time interval: | Late/Upper Kimmeridgian | ||
| Age range of interval: | 152.20000 - 149.20000 m.y. ago |
Stratigraphy
| Formation: | La Casita | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The coquina stratum bearing CPC 238 has been dated as Late/Upper Kimmeridgian, differing from other layers due to its reddish color (Zell et al., 2014). | |||||
Lithology and environment
| Primary lithology: | phosphatic silty "shale" |
| Includes fossils? | Y |
| Lithology description: "shales, siltstones, and phosphorites"; "the Tithonian section of the La Caja Formation includes a 1.5 m thick coquina layer qualified as a concentration Lagerstätte owing to its richness in marine vertebrates." | |
| Environment: | offshore |
| Glacial or sequence phase: | transgressive |
| Geology comments: "The conglomerates, sandstones and siltstones of the Kimmeridgian-Berriasian La Casita Formation characterize the Late Jurassic deltaic and inner shelf paleoenvironments proximal to the Coahuila Peninsula in the area of Saltillo and Monterrey, whereas the shales, siltstones, and phosphorites of the coeval La Caja Formation indicate more distal outer shelf facies further to the south"; "the coquina deposit formed in a shallow subtidal mud bottom environment below storm wave base, as a result of reduced rate of sedimentation and condensation, possibly due to transgression." | |
Taphonomy
| Modes of preservation: | body |
| Lagerst�tten type: | concentrate |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Abundance in sediment: | common |
| Fragmentation: | occasional |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection size: | 1 individuals | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Collectors: | teams from the SEP and MUDE | Collection dates: | 1999-2005 |
| Collection method comments: The specimen CPC 238 was collected by J. López Espinoza and a team of private collectors from a Go ́mez Farías section of the La Casita Formation, in Sierra El Jabalí, Coahuila during two field seasons, in 1999 and 2004. | |||
Metadata
| Database number: | 110176 | ||
| Authorizer: | M. Carrano, P. Mannion | Enterer: | H. Street, M. Carrano, J. Tennant, G. Varnham |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2011-06-03 05:10:14 | Last modified: | 2022-07-01 12:32:11 |
| Access level: | the public | Released: | 2011-06-03 05:10:14 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 36323. | ETE | M.-C. Buchy. 2010. First Record of Ophthalmosaurus (Reptilia: Ichthyosauria) from the Tithonian (Upper Jurassic) of Mexico. Journal of Paleontology 84(1):149-155 [M. Carrano/H. Street] |
Secondary references:
| 81216 | J. I. Barrientos-Lara and J. Alvarado-Ortega. 2021. A new ophthalmosaurid (Ichthyosauria) from the Upper Kimmeridgian deposits of the La Casita Formation, near Go ́mez Farías, Coahuila, northern Mexico. Journal of South American Earth Sciences 111:103499 [P. Mannion/G. Varnham] | |
| 48527 | M.-C. Buchy, M. T. Young, and M. B. Andrade. 2013. A new specimen of Cricosaurus saltillensis (Crocodylomorpha: Metriorhynchidae) from the Upper Jurassic of Mexico: evidence for craniofacial convergence within Metriorhynchidae. Oryctos 10:9-21 [P. Mannion/J. Tennant] | |
| 82056 | E. Frey and W. Stinnesbeck. 2014. Mexican ichthyosaurs. In H. E. Rivera-Sylva, K. Carpenter, & E. Frey (eds.), Dinosaurs and Other Reptiles from the Mesozoic of Mexico 99-109 [M. Carrano/M. Carrano] | |
| 82055 | E. Frey and W. Stinnesbeck. 2014. Plesiosaurs, reptiles between grace and awe. In H. E. Rivera-Sylva, K. Carpenter, & E. Frey (eds.), Dinosaurs and Other Reptiles from the Mesozoic of Mexico 79-98 [M. Carrano/M. Carrano] |