on highway BR 364: Tortonian, Brazil
collected by Carlos E. G. R. Schaefer 2010
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Crocodyliformes indet.
Hay 1930
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| Referred materials: MZUFV-P 0005; MZUFV-P 0010; MZUFV-P 0011; MZUFV-P 0015; MZUFV-P 0037; MZUFV-P 0038; MZUFV-P 0039; MZUFV-P 0040; MZUFV-P 0044; MZUFV-P 0045; MZUFV-P 0046; MZUFV-P 0047; MZUFV-P 0048; MZUFV-P 0049. | ||||||||||
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Caimaninae indet.
Brochu 1999
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| Referred material: MZUFV-P 0014. | ||||||||||
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Mourasuchus sp.
Price 1964
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| Referred material: MZUFV-P 0004; MZUFV-P 0009. | ||||||||||
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Melanosuchus cf. niger
Spix 1825
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| Referred material: MZUFV-P 0016. | ||||||||||
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Caiman aff. crocodilus
Linnaeus 1758
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| Referred material: MZUFV-P 0012. | ||||||||||
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Reptilia
- Testudines
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Pleurodira indet.
Cope 1865
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| Referred material: MZUFV-P 0042. | ||||||||||
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Reptilia
- Testudines
- Podocnemididae
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Podocnemididae indet.
Cope 1868
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| Referred material: MZUFV-P 0013. | ||||||||||
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Reptilia
- Testudines
- Chelidae
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Chelus sp.
Duméril 1806
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| Referred material: MZUFV-P 0006. | ||||||||||
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Mammalia
- Notoungulata
- Toxodontidae
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Toxodontidae indet.
Ameghino 1889
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| Referred material: MZUFV-P 0008. | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Brazil | State/province: | Acre | County: | Sena Madureira |
| Coordinates: | 9.0° South, 68.8° West (view map) | ||||
| Paleocoordinates: | 9.3° South, 66.8° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Tortonian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Tortonian | ||
| Age range of interval: | 11.63000 - 7.24600 m.y. ago |
Stratigraphy
| Formation: | Solimões | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Dating and thickness of the Solimões Formation adopted here follows those proposed by Cunha (2007), which corresponds to the temporal range Eocene–Pliocene age, with an estimated thickness of 2200 m.
The fossils were collected in the region of the uppermost part of the Solimões Formation. As the formation spans a lot stratigraphic timespan, I suppose that it should be more Neogene in age. It is not clear from the work which is exactly the age of this locality. This collection had an Eocene-Pliocene age assigned (based on the above). But: Kern et al., 2020: first U/Pb ages of detrital zircon grains from a core drilled in the western Brazilian Amazon showing that the top- most ~95 m sediments of the Solimões Formation have a maximum deposition age of 11.42 ± 0.66 Ma and are deposited during Tortonian (late Miocene) or younger times in the Solimões Basin. | |||||
Lithology and environment
| Primary lithology: | gray,green claystone |
| Includes fossils? | Y |
| Lithology description: It represents a strata of expansive clays, greenish gray, rich in phosphates and sulphates. It is possible to see whitish concreted areas on this level, where several bone remains abound, many of which have been rolled or transported. | |
| Environment: | fluvial-deltaic indet. |
| Geology comments: fluvial meandering paleoenvironment | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Fragmentation: | frequent |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | Carlos E. G. R. Schaefer | Collection dates: | 2010 |
| Collection method comments: Those materials are housed in the paleontological collection of the Laboratório de Paleontologia e Osteologia Comparada (LAPOC), of the Museu de Zoologia João Moojen (MZUFV), Departamento de Biologia Animal (DBA), Universidade Federal de Viçosa (UFV), Minas Gerais State, Brazil. The materials are under the acronym MZUFV-P and each specimen received its own register number. | |||
Metadata
| Database number: | 209089 | ||
| Authorizer: | E. Vlachos | Enterer: | E. Vlachos |
| Modifier: | M. Kouvari | ||
| Created: | 2020-04-24 14:49:15 | Last modified: | 2020-09-10 07:14:19 |
| Access level: | the public | Released: | 2020-04-24 14:49:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 72183. | M. B. Silva Lacerda, L. G. Souza, L. S. Lobo, C. E. G. R. Schaefer, and P. S. R. Romano. 2020. New outcrop with vertebrate remains from Solimões Formation (Eocene–Pliocene), Southern Solimões Basin, Acre State, Northern Brazil. Journal of South American Earth Sciences 101:102588:1-14 [E. Vlachos/E. Vlachos/P. Mannion] |