Colonia Orozco: Late Triassic, Uruguay
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Amphibia
- Temnospondyli
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Dvinosauria indet.
Warren 1998
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Pineiro et al. 2007 | 1 individual | ||||||||
| FC-DPV 285 (partial skull) | ||||||||||
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Amphibia
- Temnospondyli
- Laidleriidae
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Uruyiella liminea n. gen., n. sp.
Pineiro et al. 2007
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Pineiro et al. 2007 | 1 individual | ||||||||
| FC-DPV 1598 (type, partial skull) | ||||||||||
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Amphibia
- Temnospondyli
- Mastodonsauridae
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Mastodonsauridae indet.
Lydekker 1885
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Pineiro et al. 2007 | 3 specimens | ||||||||
| FC-DPV 1280, 1305, 1600 (all are partial mandibles) | ||||||||||
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Amphibia
- Temnospondyli
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Arachana nigra n. gen., n. sp.
Pineiro et al. 2012
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Pineiro et al. 2012 | 1 individual | ||||||||
| FC-DPV 1369 | ||||||||||
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Reptilia
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Archosauromorpha indet.
(Huene 1946)
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Ezcurra et al. 2015 | 4 specimens | ||||||||
| FC-DPV 2641: co-ossified basioccipital and exoccipitals; FC-DPV 2640: anterior cervical vertebra; FC-DPV 2639: middle or posterior cervical vertebra; FC-DPV 2637: middle or posterior cervical vertebra | ||||||||||
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Pintosaurus magnidentis n. gen., n. sp.
Pineiro et al. 2004
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Pineiro et al. 2004 | 1 individual | ||||||||
| FC-DPV 1181 (type, partial skull) | ||||||||||
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unclassified
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Varanopidae indet.
(Romer and Price 1940)
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6 elements | |||||||||
| FC-DPV 1182, 1183, 1189, 1199, 1200, 1333 (all are vertebral elements) | ||||||||||
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= ? Diapsida indet.
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Dias-da-Silva et al. 2006 | |||||||||
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aff. Sphenacodontidae indet.
Marsh 1878
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1 individual | |||||||||
| FC-DPV 1194 (vertebra) | ||||||||||
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= ? Diapsida indet.
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Dias-da-Silva et al. 2006 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Uruguay | State/province: | Cerro Largo |
| Coordinates: | 32.3° South, 54.1° West (view map) | ||
| Paleocoordinates: | 41.0° South, 7.0° West (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Late Triassic |
| 10 m.y. bin: | Triassic 3-4 | ||
| Key time interval: | Late Triassic | ||
| Age range of interval: | 237 - 201.4 m.y. ago |
Stratigraphy
| Formation: | Buena Vista | ||||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: The fossils of the collection are distributed within an interval of about 20 m. (see measured section in text-fig. in Pineiro et al., 2007).
Although arguments have been made for a Permian age for this locality, an Early Triassic date seems more likely (see discussion in Dias-da-Silva et al. 2006). | |||||
Lithology and environment
| Primary lithology: | red or brown muddy,sandy "siliciclastic" |
| Secondary lithology: | intraclastic conglomerate |
| Includes fossils? | Y |
| Lithology description: "Buena Vista Formation is characterized by reddish fine sandstone interbedded with lenticular clay layers and intraformational conglomerates [...] The fossils described in this paper were recovered from the conglomerates in the middle part of the Buena Vista Formation." (Pineiro et al., 2003) | |
| Environment: | fluvial indet. |
| Geology comments: "The paleoenvironment is related to the final withdrawal of the sea, and the upper part of this section is characterized by continental and strong fluvial influences." (Pineiro et al., 2003)
"there is a general consensus among authors about the fluvial environmental characterization of the Buena Vista Formation" (Pineiro et al., 2007) | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Articulated whole bodies: | none |
| Associated major elements: | some |
| Disassociated major elements: | some |
| Temporal resolution: | snapshot |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: FC-DPV = Departamento de Paleontologia, Facultad de Ciencias, Montevideo, Uruguay | |
Metadata
| Also known as: | Cerro Largo Localities | ||
| Database number: | 86401 | ||
| Authorizer: | J. Mueller, R. Butler, G. Lloyd | Enterer: | T. Liebrecht, R. Butler, G. Lloyd |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2009-02-01 17:03:37 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-02-01 17:03:37 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 29107. | G. Pineiro, M. Verde, M. Ubilla and J. Ferigolo. 2003. First Basal Synapsids (“Pelycosaurs”) from the Upper Permian - ?Lower Triassic of Uruguay. Journal of Paleontology 77(2):389-392 [J. Mueller/T. Liebrecht] |
Secondary references:
| 31842 | S. Dias-da-Silva, S. Modesto, and C. L. Schultz. 2006. New Material of Procolophon (Parareptilia: Procolophonoidea) from the Lower Triassic of Brazil, with remarks on the ages of the Sanga do Cabral and Buena Vista formations of South America. Canadian Journal of Earth Sciences 43(11):1685-1693 [J. Mueller/T. Liebrecht] | |
| 64011 | M. D. Ezcurra, P. Velozo, M. Meneghel and G. Pineiro. 2015. Early archosauromorph remains from the Permo-Triassic Buena Vista Formation of north-eastern Uruguay. PeerJ 3:e776 [R. Butler/R. Butler] | |
| 29121 | G. Pineiro, C. Marsicano, C. Goso and E. Morosi. 2007. Temnospondyl diversity of the Permian-Triassic Colonia Orozco Local Fauna (Buena Vista Formation) of Uruguay. Revista Brasileira de Paleontologia 10(3):169-180 [J. Mueller/T. Liebrecht/M. Carrano] | |
| 65041 | G. Pineiro, A. Ramos, and C. Marsicano. 2012. A rhinesuchid-like temnospondyl from the Permo-Triassic of Uruguay. Comptes Rendus Palevol 11:65-78 [G. Lloyd/G. Lloyd] | |
| 29120 | G. Pineiro, A. Rojas, and M. Ubilla. 2004. A new procolophonoid (Reptilia, Parareptilia) from the Upper Permian of Uruguay. Journal of Vertebrate Paleontology 24(4):814-821 [J. Mueller/T. Liebrecht] |