Araras/Periquitos: Late/Upper Pleistocene - Holocene, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Perissodactyla
- Tapiridae
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Tapirus rondoniensis n. sp.
Holanda et al. 2011
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1 specimen | |||||||||
Mammalia
- Cingulata
- Pampatheriidae
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Holmesina rondoniensis n. sp.
Góis et al. 2012
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Góis et al. 2012 | |||||||||
MERO-P-002 - type | ||||||||||
Mammalia
- Sirenia
- Trichechidae
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Trichechus sp.
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Perini and Cozzuol 2018 | |||||||||
new species | ||||||||||
= Trichechus hesperamazonicus n. sp.
Perini et al. 2020
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Perini et al. 2020 | |||||||||
see common names |
Geography
Country: | Brazil | State/province: | Rondonia |
Coordinates: | 10.1° South, 65.3° West (view map) | ||
Paleocoordinates: | 10.1° South, 65.3° West | ||
Basis of coordinate: | stated in text | ||
Geographic resolution: | small collection |
Time
Period: | Quaternary |
Key time interval: | Late/Upper Pleistocene - Holocene |
Age range of interval: | 0.12600 - 0.00000 m.y. ago |
Stratigraphy
Formation: | Rio Madeira |
Stratigraphic resolution: | bed |
Lithology and environment
Primary lithology: | calcareous sandstone |
Includes fossils? | Y |
Lithology description: The material was collected at the Araras locality, Nova Mamore ́ Municipality, Rondonia State, Rio Madeira Formation (Fig. 1). The outcrops of the Rio Madeira Formation are exposed along the margins and beds of the Madeira River in the Abuna ̃ Basin. This formation is subdivided into 2 units (Rizzotto et al. 2007). The lower one is composed of solid argillaceous sediments, locally bioturbated, with carbonaceous material and plant remains. The upper unit is composed of fluvial sediments, including basal conglom- erates with a sandy or calcareous matrix. Associated portions of coarse stratified sand, ferruginous and cemented by iron oxide and hydroxide, commonly occur. All the remains of vertebrates are found at this level. Above these conglomerates, in the top of the sequence, is a unit of yellow, silty clay, massive and bioturbated with levels hardened by iron oxides and hydroxides (Rizzotto et al. 2007). The sediments of the Rio Madeira Formation were accumulated in a meandering fluvial system and present facies of channel bars and evidence of fluvial floodplains. | |
Environment: | fluvial indet. |
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 |
Metadata
Also known as: | Araras; Periquitos; right margin of Madeira River, Rio Madeira | ||
Database number: | 197104 | ||
Authorizer: | M. Uhen, P. Holroyd | Enterer: | M. Uhen, K. Magoulick |
Modifier: | G. Varnham | Research group: | vertebrate |
Created: | 2018-10-23 09:53:19 | Last modified: | 2020-08-27 05:34:07 |
Access level: | the public | Released: | 2018-10-23 09:53:19 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
39869. | E. C. Holanda, J. Ferigolo, and A. M. Ribeiro. 2011. New Tapirus species (Mammalia: Perissodactyla: Tapiridae) from the upper Pleistocene of Amazonia, Brazil. Journal of Mammalogy 92(1):111-120 [M. Uhen/M. Shalap/M. Uhen] |
Secondary references:
69877 | F. Góis, G. J. Scillato-Yané, A. A. Carlini and M. Ubilla. 2012. Una nueva especie de Holmesina simpson (xenarthra, cingulata, pampatheriidae) del pleistoceno de rondônia, sudoeste de la Amazonia, Brasil. Revista Brasileira de Paleontologia 15(2):211-227 [P. Holroyd/K. Magoulick/P. Mannion] | |
34991 | F. A. Perini and M. A. Cozzuol. 2018. An extinct species of Trichechus Linnaeus, 1658 (Sirenia, Trichechidae) from the Late Pleistocene of Southwestern Amazonia. Society of Vertebrate Paleontology Abstracts of Papers 78:197 [M. Uhen/K. Feoli/M. Uhen] | |
71585 | F. A. Perini, E. R. Nascimento, and M. A. Cozzuol. 2020. A new species of Trichechus Linnaeus, 1758 (Sirenia, Trichechidae), from the upper Pleistocene of southwestern Amazonia, and the evolution of Amazonian manatees. Journal of Vertebrate Paleontology e1697882 [M. Uhen/M. Uhen/P. Mannion] |