Araras/Periquitos: Late/Upper Pleistocene - Holocene, Brazil

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Perissodactyla - Tapiridae
Tapirus rondoniensis n. sp. Holanda et al. 2011
1 specimen
Mammalia - Cingulata - Pampatheriidae
Holmesina rondoniensis n. sp. Góis et al. 2012
Góis et al. 2012
MERO-P-002 - type
Mammalia - Sirenia - Trichechidae
Trichechus sp.
Perini and Cozzuol 2018
new species
    = Trichechus hesperamazonicus n. sp. Perini et al. 2020
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]