Estancia Pampa Grande, East of Route 9, between Bordo and Toro Rivers: Ypresian, Argentina
|
Mammalia
|
|
|
|
|
1 specimen |
|
|
Reptilia
|
|
|
|
Albino 2018 |
|
|
| MMP 4660-M - holotype |
|
Reptilia
- Teiidae
|
|
|
|
Powell et al. 2011 |
1 specimen |
|
| MMP 1418, various bones, holotype |
|
Reptilia
- Sebecidae
|
|
|
|
Gasparini 1984 |
1 specimen |
|
| M.L.P. 79-XI-22-17 (tooth) |
| see common names |
| Country: | Argentina |
State/province: | Salta |
County: | Guachipas |
| Coordinates: |
25.8° South, 65.5° West (view map) |
| Paleocoordinates: | 27.9° South, 52.0° West (Wright 2013) |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | local area |
| Period: | Paleogene |
Epoch: | Eocene |
| Stage: | Ypresian |
10 m.y. bin: | Cenozoic 2 |
| *Period: | Early/Lower Tertiary |
*Epoch: | Paleocene - Early/Lower Eocene |
| Key time interval: | Ypresian |
Mammal zone: | Vacan |
| Age range of interval: | 56 - 48.07 m.y. ago |
| * legacy (obsolete) database fields |
| Geological group: | Salta |
Formation: | Lumbrera |
Stratigraphy comments: 5 m below the "Lower Green Level" of the Lumbrera Formation (Salta Group, Santa Barbara Subgroup)
Lower Lumbrera assemblage, Vacan SELMA
Powell et al., 2011: Recently, geologic and paleontologic evidence allowed the correlation of the upper levels of Lumbrera with Geste, Casa Grande, and Quebrada de los Colorados Formations. Additionally, these levels were referred to the late-middle Eocene (Casamayoran SALMA -South American Land Mammal Age-, Barrancan subage) by an U/Pb dating of 39.9 Ma . The lower levels of the Lumbrera Formation are here referred to the Vacan subage of the Casamayoran SALMA.
Fernicola et al. 2021 obtained an 238U-206Pb isochron age of 46.2 +/- 7.3 Ma for samples from the Lower Lumberer Fm, suggesting that the Lower section of the formation was deposited between 55–46Ma. "According to different authors, the fossiliferous levels of the lower section of the Lumbrera Fm. are equivalent to the Vacan Subage (del Papa et al. 2010; Powell et al. 2011; García-López et al. 2019). However, this biochronology is not supported by the absolute dating provided in this work. The top of the LSLF is now established by radioisotopy at 46. 2 ± 7.3 Ma (early Lutetian), and the record of the EECO and ETM2 in the first 150 m of the LSLF set the initial deposition of the sec- tion in the early Eocene (early Ypresian). With these new constraints, the species based on specimens recovered on the lower levels of the LSLF (this work) are chronologi- cally equivalent to the Itaboraian SALMA (56.1–51.4 Ma; Woodburne et al. 2014; Krause et al. 2017)."
|
| Primary lithology: | ferruginous,peloidal,red sandy mudstone |
| Secondary lithology: | marl |
| Lithology description: Pelite and marl, predominantly brick red in color with a bit of sandstone. |
| Environment: | terrestrial indet. |
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Disassociated minor elements: | some |
| Fragmentation: | frequent |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | MLP |
| Database number: | 20983 |
| Authorizer: | J. Alroy, J. Zijlstra, P. Mannion |
Enterer: | J. Wertheim, J. Zijlstra, J. Alroy, P. Mannion |
| Modifier: | G. Varnham |
Research group: | vertebrate |
| Created: | 2002-06-13 11:55:44 |
Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public |
Released: | 2002-06-13 11:55:44 |
| Creative Commons license: | CC0 |
| 6454. | 5% 28980 | R. Pascual. 1980. Nuevos y singulares tipos ecologicos de marsupiales extinguidos de America del Sur (Paleoceno Tardio o Eoceno Temprano) del Noroeste Argentina
. Actas del Segundo congreso argentino de paleontologia y bioestratigrafia y Primer congreso latinoamericano de paleontologia 2:151-173 [J. Alroy/J. Wertheim/M. Uhen] |
| 65802 | | A. M. Albino. 2018. New macrostomatan snake from the Paleogene of northwestern Argentina. Geobios 51(3):175-179 [P. Mannion/P. Mannion/P. Mannion] |
| 59437 | | S. Brizuela and A. M. Albino. 2016. First Tupinambinae teiid (Squamata, Teiidae) from the Palaeogene of South America. Historical Biology 8(4):571-581 [P. Barrett/T. Cleary] |
| 31227 | | Z. Gasparini. 1984. New Tertiary Sebecosuchia (Crocodylia: Mesosuchia) from Argentina. Journal of Vertebrate Paleontology 4(1):85-95 [J. Alroy/J. Alroy] |
| 58261 | | J. E. Powell, M. J. Babot, D. A. García López, M. V. Deraco, and C. Herrera. 2011. Eocene vertebrates of northwest Argentina: annotated list. In J. Salfity, R. A. Marquillas (eds.), Cenozoic Geology of the Central Andes of Argentina 349-370 [J. Zijlstra/J. Zijlstra/J. Zijlstra] |