Tierra Buena, W Huizachal Canyon: Pliensbachian, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Rhynchocephalia
- Sphenodontidae
|
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| Clark et al. 1994 | 1 specimen | |||||||||
| "taxon B"; IGM 3497, crushed skull | ||||||||||
|
= Zapatadon ejidoensis n. gen., n. sp.
Reynoso and Clark 1998
|
Reynoso and Clark 1998 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Tamaulipas |
| Coordinates: | 26.6° North, 99.5° West (view map) | ||
| Paleocoordinates: | |||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Early Jurassic |
| Stage: | Pliensbachian | 10 m.y. bin: | Jurassic 2 |
| Key time interval: | Pliensbachian | ||
| Age range of interval: | 192.9 - 184.2 m.y. ago | ||
| Age estimate: | maximum 189 ± 0.2 Ma (U/Pb) |
Stratigraphy
| Geological group: | Huizachal | Formation: | La Boca | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Lower part of the La Boca Formation; originally dated as Middle Jurassic, but U-Pb isotopic data from zircon in a volcaniclastic rock from the lowest part of the formation yields an age of 189 plus/minus 0.2 Ma. The fossil-bearing sedimentary rocks are above this unit and conformable with it (see Montellano et al. 2008: JVP 28: 1130–1143). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | "floodplain" |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | surface (float),surface (in situ),mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: IGM: Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico | |
Metadata
| Database number: | 105237 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler |
| Modifier: | P. Wagner | Research group: | vertebrate |
| Created: | 2011-02-17 21:18:41 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2011-02-17 21:18:41 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 35196. | V.-H. Reynoso and J. M. Clark. 1998. A dwarf sphenodontian from the Jurassic La Boca Formation of Tamaulipas, Mexico. Journal of Vertebrate Paleontology 18:333-339 [R. Butler/R. Butler] |
Secondary references:
| 43803 | J. M. Clark, M. Montellano, J. A. Hopson, R. Hernandez, and D. E. Fastovsky. 1994. An Early or Middle Jurassic tetrapod assemblage from the La Boca Formation, northeastern Mexico. In N. C. Fraser, H.-D. Sues (eds.), In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods 295-302 [R. Butler/R. Butler/R. Butler] | |
| 82053 | V. H. Reynoso and J. A. Cruz. 2014. Mesozoic lepidosauromorphs of Mexico: a review and discussion of taxonomic assignments. In H. E. Rivera-Sylva, K. Carpenter, & E. Frey (eds.), Dinosaurs and Other Reptiles from the Mesozoic of Mexico 44-78 [M. Carrano/M. Carrano] |