LACM Loc. 8060, Río Guatemala: Late Oligocene, Puerto Rico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
- Pelomedusidae
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Reptilia
- Crocodylia
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Crocodylia indet.
(Owen 1842)
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Mammalia
- Rodentia
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Caribeomys merzeraudi n. gen., n. sp.
Marivaux et al. 2021
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Marivaux et al. 2021 | 2 specimens | ||||||||
| Holotype. LACM 162449, right lower molar (m1 or m2; Figs 2A, 4). Hypodigm. In addition to the holotype, LACM 162478, a right fourth lower deciduous premolar (dp4; Figs 2B, 3). | ||||||||||
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Caviomorpha indet.
(Wood and Patterson 1955)
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1 specimen | |||||||||
| LACM 162448 | ||||||||||
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Borikenomys praecursor n. gen., n. sp.
Marivaux et al. 2020
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Marivaux et al. 2020 | |||||||||
| LACM 162447 - holotype; hypodigm: LACM162446 and MA 316 | ||||||||||
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Mammalia
- Sirenia
- Dugongidae
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| 3 specimens | ||||||||||
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= Priscosiren atlantica n. gen., n. sp.
Velez-Juarbe and Domning 2014
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Velez-Juarbe and Domning 2014 | |||||||||
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Chondrichthyes
- Orectolobiformes
- Ginglymostomatidae
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Ginglymostomatidae indet.
Gill 1862
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| see common names | ||||||||||
Geography
| Country: | Puerto Rico |
| Coordinates: | 18.3° North, 67.0° West (view map) |
| Paleocoordinates: | 19.4° North, 61.5° West (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Late Oligocene | ||
| Age range of interval: | 27.3 - 23.04 m.y. ago | ||
| Age estimate: | 29.78 to 29.17 Ma (Sr isotope) |
Stratigraphy
| Formation: | San Sebastian | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: basal San Sebastian Formation
Ortega-Ariza et al. 2015: Results indicate ages of middle to late Oligocene for the San Sebastian Formation (ca. 29.78– 26.51 Ma) | |||||
Lithology and environment
| Primary lithology: | conglomerate |
| Includes fossils? | Y |
| Lithology description: The overall lithology of the San Sebastian Formation along this section consists of conglomerates and paleosols interbedded with marine mudstones and siltstones and occasional cross-bedded coarse sand units (Ve ́lez-Juarbe et al., 2007). | |
| Environment: | lagoonal |
| Geology comments: This unit likely represented a shallow marine or brackish nearshore lagoon. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Museum repositories: | LACM |
Metadata
| Database number: | 155752 | ||
| Authorizer: | M. Uhen, E. Vlachos, P. Mannion | Enterer: | M. Uhen, P. Mannion, E. Vlachos |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2014-04-29 13:51:24 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2014-04-29 13:51:24 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 48846. | J. Velez-Juarbe, T. Martin, R. D. MacPhee and D. Ortega-Ariza. 2014. The earliest Caribbean rodents: Oligocene caviomorphs from Puerto Rico. Journal of Vertebrate Paleontology 34(1):157-163 [M. Uhen/S. Alam/M. Uhen] |
Secondary references:
| 71708 | L. Marivaux, J. Vélez-Juarbe, G. Merzeraud, F. Pujos, L. W. Viñola López, M. Boivin, H. Santos-Mercado, E. J. Cruz, A. Grajales, J. Padilla, K. I. Vélez-Rosado, M. Philippon, J.-L. Léticée, P. Münch, and P.-O. Antoine. 2020. Early Oligocene chinchilloid caviomorphs from Puerto Rico and the initial rodent colonization of the West Indies. Proceedings of the Royal Society B 287:20192806:1-10 [P. Mannion/P. Mannion] | |
| 77448 | L. Marivaux, J. Vélez-Juarbe, L. W. Viñola López, P.-H. Fabre, F. Pujos, H. Santos-Mercado, E. J. Cruz, A. M. Grajales Pérez, J. Padilla, K. I. Vélez-Rosado, J.-J. Cornée, M. Philippon, P. Münch and P.-O. Antoine. 2021. An unpredicted ancient colonization of the West Indies by North American rodents: dental evidence of a geomorph from the early Oligocene of Puerto Rico. Papers in Palaeontology 7(4):2021-2039 [E. Vlachos/E. Vlachos/P. Mannion] | |
| 79668 | D. Ortega-Ariza, E. K. Franseen, H. Santos-Mercado, W. R. Ramírez-Martínez, and E. E. Core-Suárez. 2015. Strontium Isotope Stratigraphy for Oligocene-Miocene Carbonate Systems in Puerto Rico and the Dominican Republic: Implications for Caribbean Processes Affecting Depositional History. The Journal of Geology 123:539-560 [P. Mannion/G. Varnham] | |
| 51981 | J. Velez-Juarbe and D. P. Domning. 2014. Fossil Sirenia of the West Atlantic and Caribbean region: X. Priscosiren atlantica, gen. et sp. nov. Journal of Vertebrate Paleontology 34(4):951-964 [M. Uhen/M. Uhen] |