Cerro Rucañanco: Serravallian, Chile

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Suliformes - Anhingidae
Meganhinga chilensis n. gen., n. sp. Alvarenga 1995
Mammalia - Cingulata - Dasypodidae
Eutatini indet. (Bordas 1933)
Solórzano et al. 2019
SGO.PV.22476
Mammalia - Panameriungulata - Macraucheniidae
Theosodon sp. Ameghino 1887
Solórzano et al. 2019
SGO.PV.4000
Amphibia - Temnospondyli - Bufonidae
cf. Rhinella sp. Fitzinger 1826
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
Nematogenys cuivi n. sp. Azpelicueta and Rubilar 1998
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]