Cerro Rucañanco: Serravallian, Chile
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Suliformes
- Anhingidae
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Meganhinga chilensis n. gen., n. sp.
Alvarenga 1995
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Mammalia
- Cingulata
- Dasypodidae
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Eutatini indet.
(Bordas 1933)
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Solórzano et al. 2019 | |||||||||
SGO.PV.22476 | ||||||||||
Mammalia
- Panameriungulata
- Macraucheniidae
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Theosodon sp.
Ameghino 1887
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Solórzano et al. 2019 | |||||||||
SGO.PV.4000 | ||||||||||
Amphibia
- Temnospondyli
- Bufonidae
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cf. Rhinella sp.
Fitzinger 1826
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Guevara et al. 2022 | |||||||||
SGO.PV.22205, distal half of a left humerus in natural articulation with the proximal half of radioulnae | ||||||||||
Actinopteri
- Siluriformes
- Nematogenyidae
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Nematogenys cuivi n. sp.
Azpelicueta and Rubilar 1998
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Azpelicueta and Rubilar 1998 | |||||||||
CPUC Lonq (R)/7 (holotype); CPUC Lonq (R)/9, CPUC Lonq (R)/10 (paratypes) | ||||||||||
see common names |
Geography
Country: | Chile | State/province: | Malleco | County: | Lonquimay |
Coordinates: | 38.7° South, 71.2° West (view map) | ||||
Paleocoordinates: | 39.2° South, 67.5° West | ||||
Basis of coordinate: | stated in text | ||||
Altitude: | 1250 meters | ||||
Geographic resolution: | local area |
Time
Period: | Neogene | Epoch: | Miocene |
Stage: | Serravallian | 10 m.y. bin: | Cenozoic 5 |
Key time interval: | Serravallian | ||
Age range of interval: | 13.82000 - 11.62000 m.y. ago |
Stratigraphy
Formation: | Cura-Mallin | Member: | Rio Pedregoso | ||
Stratigraphic resolution: | member | ||||
Stratigraphy comments: Text comments only state that the fossil comes from the upper member. Figure 1 describes such member as the Rio Pedregoso Member. The detailed stratigraphy of the area, which represents a fluvio-lacustrine environment, has been provided by Suarez and Emparan (1988, 1995).
However, the fossil-bearing sections of Piedra Parada, Puente Tucapel, and Cerro Solarzano et al., 2019: Rucañanco probably have ages close to 12.8–11.64 Ma (Serravallian; Fig. 2), because the available detrital zircons maximum ages could be interpreted as near-sedimentation ages. Pedroza et al. 2017 proposed a new stratigraphic scheme that would move Cura-Mallin to group level, Rio Pedregoso to Formation level, and as a result this locality would fall under the Rucañanco member, but this scheme has yet to reviewed comprehensively. |
Lithology and environment
Primary lithology: | sandstone |
Secondary lithology: | conglomerate |
Lithology description: Composed mainly of sandstones and conglomerates | |
Environment: | fluvial-lacustrine indet. |
Geology comments: The detailed stratigraphy of the area, which represents a fluvio-lacustrine environment, has been provided by Suarez and Emparan (1988, 1995). |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 137122 | ||
Authorizer: | C. Jaramillo, P. Mannion, M. Uhen | Enterer: | G. Ballen, G. Varnham, M. Uhen |
Modifier: | G. Varnham | Research group: | vertebrate |
Created: | 2012-12-10 17:53:51 | Last modified: | 2022-03-31 08:00:32 |
Access level: | group members | Released: | 2015-12-10 17:53:51 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
77314. | H. M. F. Alvarenga. 1995. A large and probably flightless anhinga from the Miocene of Chile. Courier Forschungsinstitut Senkenberg 181:149-161 [M. Uhen/M. Uhen] |
Secondary references:
43825 | M. M. Azpelicueta and A. Rubilar. 1998. A Miocene Nematogenys (Teleostei: Siluriformes: Nematogenyidae) from South-Central Chile. Journal of Vertebrate Paleontology 18(3):475-483 [C. Jaramillo/G. Ballen/G. Ballen] | |
81059 | J. P. Guevara, F. S. Lara, J. Alarcón-Muñoz, K. E. Buldrinif, S. Soto-Acuña and D. Rubilar-Rogers. 2022. The first fossil toad (Anura: Bufonidae) from the Cura-Mallín Formation (Río Pedregoso Member, middle Miocene) of Lonquimay, Araucania Region, Central Chile. Journal of South American Earth Sciences 115:103753 [P. Mannion/G. Varnham] | |
73352 | A. Solórzano, A. Encinas, R. Bobe, R. Maximiliano, and G. Carrasco. 2019. The Early to late Middle Miocene mammalian assemblages from the Cura-Mallín Formation, at Lonquimay, southern Central Andes, Chile (~38°S): Biogeographical and paleoenvironmental implications. Journal of South American Earth Sciences 96(102319):1-18 [P. Mannion/G. Varnham] | |
77299 | S. Soto-Acuña, J. Alarcón, R. E. Yury-Yáñez, R. A. Otero, and M. Sallaberry. 2013. Nuevos materiales de Meganhinga chilensis (Suliformes, Anhingidae) del Mioceno temprano de Lonquimay, Región de la Araucanía de Chile Central. Jornadas Argentinas de Paleontoogia de Vertebrados 27:84 [M. Uhen/M. Uhen] |