Laguna Chillhue: Huayquerian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Paucituberculata - Caenolestidae
Mammalia - Didelphimorphia
Romano et al. 2023
Mammalia - Notoungulata
Cerdeño and Montalvo 2002
GHUNLPam 151, GHUNLPam 339, GHUNLPam 2018, GHUNLPam 2303, GHUNLPam 5675, GHUNLPam 8157, GHUNLPam 8413, GHUNLPam 8414-8415, GHUNLPam 12648
Tremacyllus impressus (Ameghino 1888)
Sostillo et al. 2018
GHUNLPam 5563, 8712
Paedotherium sp. Burmeister 1888
Cerdeño et al. 2017
Paedotherium minor Cabrera 1937
Sostillo et al. 2021
Mammalia - Notoungulata - Mesotheriidae
Sostillo et al. 2021
Sostillo et al. 2021
GHUNLPam 8624, 9007, 160
Mammalia - Panameriungulata - Proterotheriidae
Schmidt et al. 2018
Mammalia - Panameriungulata - Macraucheniidae
Macraucheniinae indet. (Gervais 1855)
Schmidt et al. 2022
Romano et al. 2023
GHUNLPam 18805, incomplete right maxilla with P3-4, fragment of M1, M2, and associated left M3
Mammalia - Rodentia - Echimyidae
Verzi et al. 1995
Mammalia - Rodentia
Verzi 1999
GHUNLPam 311 and GHUNLPam 2011
Mammalia - Rodentia - Abrocomidae
Protabrocoma antiqua Rovereto 1914
Romano et al. 2023
Mammalia - Rodentia - Octodontidae
Piñero et al. 2021
GHUNLPam 303, 307, 2227, 5088, 5090, 5234
Mammalia - Rodentia - Hydrochoeridae
Vucetich et al. 2014
Romano et al. 2023
Mammalia - Cingulata - Dasypodidae
Esteban et al. 2000
GHUNLPam 23 16/17
Esteban et al. 2000
Proeuphractus sp. Ameghino 1886
Esteban et al. 2000
Zaedyus pichiy Desmarest 1804
Esteban et al. 2000
Esteban et al. 2000
Esteban et al. 2000
Esteban et al. 2000
Macrochorobates scalabrinii (Moreno and Mercerat 1891)
Esteban et al. 2000
Mammalia - Cingulata - Panochthidae
Hoplophorus sp. Lund 1838
Romano et al. 2023
Mammalia - Cingulata
Romano et al. 2023
Romano et al. 2023
Mammalia - Mylodontidae
Montalvo et al. 2020
GHUNLPam 4326
see common names

Geography
Country:Argentina State/province:La Pampa
Coordinates: 37.7° South, 63.5° West (view map)
Paleocoordinates:37.5° South, 61.9° West (Wright 2013)
Basis of coordinate:stated in text
Altitude:185 meters
Geographic resolution:outcrop
Time
Period: Neogene
10 m.y. bin: Cenozoic 6
Key time interval: Huayquerian Mammal zone:  Huayquerian
Age range of interval: 8 - 5 m.y. ago
Stratigraphy
Formation:Cerro Azul
Stratigraphic resolution:formation
Stratigraphy comments: Schmidt et al. 2018: Figure 2 illustrates the stratigraphic distribution of the locality giving a general age estimate of 7.5-8.0Ma.

Sostillo et al. 2018: The Cerro Azul Formation deposits (Linares et al., 1980)
are discontinuous along the whole occupied area in the provinces of La Pampa and Buenos Aires (Fig. 2). They are composed of silts, sandy silts and very thin silty sands, reddish and brown colored, with a homogeneous and com- pact general aspect, and frequent carbonate nodules and evidences of pedogenic processes (Folguera and Zárate, 2009). Visconti et al. (2010) interpreted them as eolian de- posits characterized by loessic materials, with a high per- centage of lithic fragments and volcaniclastic sediments. Detailed geological and stratigraphic descriptions of the Cerro Azul Formation are provided by Linares et al. (1980), Goin et al. (2000), Visconti et al. (2010), and Folguera and Zárate (2009).
In particular, remains from Laguna Chillhué and Quehué (Pascual and Bondesio, 1982; Montalvo et al., 1995; Sostillo, 2016) were recovered from the lower levels of the Cerro Azul Formation and interpreted as fluvial fa- cies (Deschamps et al., 2013; Sostillo et al., 2014).
Lithology and environment
Primary lithology:brown lithified siltstone
Secondary lithology: sandstone
Includes fossils?Y
Environment:fluvial indet.
Geology comments: Schmidt et al. 2018: At Laguna Chillhue and Salinas Grandes de Hidalgo, fluvial and eolian deposits are intercalated (Deschamps et al., 2013; Mehl and Zarate, 2014).
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: Esteban, et al. 2000: Todos los ejemplares analizados están depositados en
la Cátedra de Geología Histórica de la Facultad de Ciencias Exactas y Naturales de la Universidad Nacional ele La Pampa, Argentina, cuyo acrónimo es GHUNLPam
Metadata
Also known as:Laguna Chillhué
Database number:151498
Authorizer:C. Jaramillo, J. Carrillo, P. Mannion Enterer:J. Carrillo, P. Mannion, M. Kouvari, G. Varnham, K. Pino
Modifier:G. Varnham Research group:vertebrate
Created:2013-10-04 23:13:29 Last modified:2025-02-22 15:12:02
Access level:the public Released:2013-10-04 23:13:29
Creative Commons license:CC0
Reference information

Primary reference:
48408. F. J. Goin, C. I. Montalvo, and G. Visconti. 2000. Los marsupiales (Mammalia) del Mioceno Superior de la Formacion Cerro Azul(Provincia de La Pampa, Argentina). Estudios Geol 56:101-126 [C. Jaramillo/J. Carrillo/J. Carrillo]

Secondary references:

73117 E. Cerdeño and C. I. Montalvo. 2002. Los Hegetotheriinae (Hegetotheriidae, Notoungulata) del Mioceno superior de la provincia de La Pampa, Argentina. Revista del Museo Argentina de Ciencias Naturales 41(1):35-43 [P. Mannion/G. Varnham]
70179 E. Cerdeño, C. I. Montalvo, and R. Sostillo. 2017. Deciduous dentition and eruption pattern in late Miocene Pachyrukhinae (Hegetotheriidae, Notoungulata) from La Pampa Province, Argentina. Historical Biology 29(3):359-375 [P. Mannion/M. Kouvari]
70059 G. I. Esteban, N. L. Nasif, and C. I. Montalvo. 2000. Nuevos registros de Dasypodidae (Xenarthra) del Mioceno tardío de la provincia de La Pampa, Argentina. Revista Espanola de Paleontología 16(1):77-87 [P. Mannion/M. Kouvari]
73341 C. I. Montalvo, A. R. Miño-Boilini, R. Sostillo, E. Cerdeño, M. C. Cardonatto and R. A. Bonini. 2020. The Scelidotheriinae Proscelidodon gracillimus (Xenarthra: Mylodontidae) from the Cerro Azul Formation (late Miocene), Argentina: Ontogenetic variability and taxonomy. Journal of South American Earth Sciences 102754 [P. Mannion/P. Mannion]
85280 P. Piñero, D. H. Verzi, A. I. Olivares, C. I. Montalvo, R. L. Tomassini and A. Fernández Villoldo. 2021. Evolutionary pattern of Metacaremys gen. nov. (Rodentia, Octodontidae) and its biochronological implications for the late Miocene and early Pliocene of southern South America. Papers in Palaeontology 7(4):1859-1917 [J. Carrillo/K. Pino/P. Mannion]
85650 C. O. Romano, R. Bonini, S. Hemming, M. Cenizo, U. F. J. Pardiñas and F. J. Prevosti. 2023. Advances in the understanding of Neogene mammalian fauna in the Pampean region (central Argentina) through revising “biozone” hypotheses based on new dates and biochronological analyses. Ameghiniana 60(5):465-491 [J. Carrillo/K. Pino]
69166 G. I. Schmidt, C. I. Montalvo, R. Sostillo and E. Cerdeño. 2018. Proterotheriidae (Mammalia, Litopterna) from the Cerro Azul Formation (late Miocene), La Pampa Province, Argentina. Journal of South American Earth Sciences 83:165-177 [P. Mannion/G. Varnham]
86911 G. I. Schmidt, C. I. Montalvo, E. Cerdeño, R. Sostillo, R. L. Tomassini and R. A. Bonini. 2022. Updated data on Litopterna from the Huayquerian Stage/Age (Late Miocene-Early Pliocene) of central-east Argentina. Comptes Rendus Palevol 21(32):721-743 [P. Mannion/G. Varnham/P. Mannion]
72326 R. Sostillo, E. Cerdeno, and C. I. Montalvo. 2018. Taxonomic implications of a large sample of Tremacyllus (Hegetotheriidae: Pachyrukhinae) from the late Miocene Cerro Azul formation of La Pampa, Argentina. Ameghiniana 55(4):407-422 [P. Mannion/M. Kouvari]
84590 R. Sostillo, C. I. Montalvo, E. Cerdeño, G. I. Schmidt, A. Folguera and M. C. Cardonatto. 2021. Updated knowledge on the Notoungulata (Mammalia) from the late Miocene Cerro Azul Formation, La Pampa Province, Argentina. Historical Biology An International Journal of Paleobiology 33(8):1247-1265 [J. Carrillo/K. Pino]
65013 D. H. Verzi. 1999. The dental evidence on the differentiation of the ctenomyine rodents (Caviomorpha, Octodontidae, Ctenomyinae). Acta Theriologica 44(3):263-282 [C. Jaramillo/J. Carrillo]
69245 D. H. Verzi, M. G. Vucetich, and C. I. Montalvo. 1995. Un nuevo Eumysopinae (Rodentia, Echimyidae) de Mioceno tardío de la Provincia de La Pampa y consideraciones sobre la historia de la subfamilia. Ameghiniana 32:191-195 [P. Mannion/G. Varnham]
70761 M. G. Vucetich, C. M. Deschamps, E. C. Vieytes and C. I. Montalvo. 2014. Late Miocene Capybaras from Argentina: Skull Anatomy, Taxonomy, Evolution, and Biochronology. Acta Palaeontologica Polonica 59(3):517-535 [P. Mannion/M. Kouvari/M. Kouvari]