Quehue: Huayquerian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Temnospondyli - Ceratophrynidae
Lepidobatrachus sp. Budgett 1899
Nicoli 2017
GHUNLPam 8633, incomplete right maxilla
Reptilia - Tinamiformes - Tinamidae
Nothura sp. Wagler 1827
Cenizo et al. 2012
GHUNLPam 27042, distal portion of right humerus, GHUNLPam 5901/1, proximal portion of left tarsometatarsus, GHUNLPam 5901/2, distal portion of right tarsometatarsus
Mammalia - Mylodontidae
Montalvo et al. 2020
GHUNLPam 9151
Mammalia - Cingulata - Dasypodidae
Esteban et al. 2000
Esteban et al. 2000
Urrutia et al. 2008
Euphractini incertae sedis
Proeuphractus sp. Ameghino 1886
Esteban et al. 2000
Zaedyus pichiy Desmarest 1804
Esteban et al. 2000
Esteban et al. 2000
Esteban et al. 2000
Macrochorobates scalabrinii (Moreno and Mercerat 1891)
Esteban et al. 2000
Mammalia - Cingulata
Romano et al. 2023
Romano et al. 2023
Mammalia - Rodentia - Chinchillidae
Montalvo et al. 2023
GHUNLPam 5822 left mandible with p4-m3, GHUNLPam 5823 left mandible with p4-m3, GHUNLPam 14710 left mandible with i and p4-m3.
Montalvo et al. 2023
GHUNLPam 5824 right mandible with i and p4, GHUNLPam 5874 right mandible with broken i and p4-m2.
Mammalia - Rodentia - Octodontidae
Romano et al. 2023
Piñero et al. 2021
GHUNLPam 6663, 8552, 14372, 14374, 19119, 22760
Mammalia - Rodentia - Abrocomidae
Protabrocoma antiqua Rovereto 1914
Romano et al. 2023
Mammalia - Rodentia
Verzi et al. 2011
GHUNLPam 2948 - Neophanomys biplicatus according to ref 70240
Mammalia - Rodentia - Echimyidae
Reigechimys plesiodon Verzi et al. 1994
Romano et al. 2023
Mammalia - Notoungulata - Mesotheriidae
Sostillo et al. 2021
Sostillo et al. 2021
GHUNLPam 9154
Mammalia - Notoungulata
Paedotherium minor Cabrera 1937
Sostillo et al. 2021
GHUNLPam 812
Tremacyllus impressus (Ameghino 1888)
Sostillo et al. 2018
GHUNLPam 8195-6, 8642
Mammalia - Sparassodonta - Thylacosmilidae
Mammalia - Didelphimorphia
Romano et al. 2023
see common names

Geography
Country:Argentina State/province:La Pampa
Coordinates: 37.0° South, 64.5° West (view map)
Paleocoordinates:36.7° South, 62.9° West (Wright 2013)
Basis of coordinate:stated in text
Altitude:216 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
Age estimate: 7.311 to 6.474 Ma (other)
Stratigraphy
Formation:Cerro Azul
Stratigraphic resolution:group of beds
Stratigraphy comments: Sostillo et al 2018: 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 facies (Deschamps et al., 2013; Sostillo et al., 2014).

Romano et al. 2023: Biochronological methods were useful in ordering and estimating the age of the different faunas of the Cerro Azul Formation, ranging from ca. 8 to ca. 5.7 Ma. Some appear to be transitional between Chasicoan and “Huayquerian” faunas (Cerro La Bota, Cerro Patagua, and Algarrobo del Águila), and other three (Barrancas Coloradas, El Guanaco, and Caleufú) cover the latest Miocene, even some of them could have reached the earliest Pliocene. The Cerro Azul Formation localities cover the range between ca. 8 to ca. 5.7 Ma (late Tortonian–Messinian; Late Miocene; Fig. 3; Supplementary Online Information 1, Tab. S8). 6.826 Ma (6.474 - 7.311 Ma) for Quehue.
Lithology and environment
Primary lithology:paleosol/pedogenic,nodular,red or brown sandstone
Secondary lithology: siltstone
Lithology description: 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)
Environment:fluvial indet.
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:Quehué
Database number:151500
Authorizer:C. Jaramillo, P. Mannion, J. Carrillo, E. Vlachos Enterer:J. Carrillo, P. Mannion, M. Kouvari, E. Vlachos, G. Varnham, K. Pino
Modifier:K. Pino Research group:vertebrate
Created:2013-10-04 23:52:54 Last modified:2025-02-22 15:12:02
Access level:the public Released:2013-10-04 23:52:54
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:

72948 M. M. Cenizo, C. P. Tambussi, and C. I. Montalvo. 2012. Late Miocene continental birds from the Cerro Azul Formation in the Pampean region (central- southern Argentina). Alcheringa: An Australasian Journal of Palaeontology 36(1):47-68 [P. Mannion/G. Varnham]
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]
85601 C. I. Montalvo, R. Sostillo, and L. L. Rasia. 2023. New light on the late Middle Miocene–Early Pliocene representatives of Lagostomus (Chinchillidae, Rodentia) from Cerro Azul Formation, Argentina. Journal of South American Earth Sciences 128(104481) [J. Carrillo/K. Pino]
63091 L. Nicoli. 2017. The presence of Lepidobatrachus (Anura, Ceratophryidae) in the Neogene of La Pampa Province, Argentina. Ameghiniana 54(6):700-705 [E. Vlachos/E. Vlachos/E. Vlachos]
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]
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]
70799 J. J. Urrutia, C. I. Montalvo, and G. J. Scillato-Yane. 2008. Dasypodidae (Xenarthra, Cingulata) de la Formación Cerro Azul (Mioceno tardío) de la provincia de La Pampa, Argentina. Ameghiniana 45(2):289-302 [P. Mannion/M. Kouvari]
70240 D. H. Verzi, C. I. Montalvo, and M. G. Vucetich. 1999. Afinidades y significado evolutivo de Neophanomys biplicatus (Rodentia, Octodontidae) del Mioceno tardio-Plioceno temprano de Argentina. Ameghiniana 36(1):83-90 [P. Mannion/M. Kouvari]
65000 D. H. Verzi, E. C. Vieytes, and C. I. Montalvo. 2011. Dental evolution in Neophanomys (Rodentia, Octodontidae) from the late Miocene of central Argentina. Geobios 44(6):621-633 [C. Jaramillo/J. Carrillo]