Quehue (Miocene of Argentina)

Also known as Quehué

Where: La Pampa, Argentina (37.0° S, 64.5° W: paleocoordinates 37.2° S, 62.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Huayquerian mammal zone, Cerro Azul Formation, Huayquerian (9.0 - 6.8 Ma)

• 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.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; paleosol/pedogenic, nodular sandstone and siltstone

• 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)

Size class: macrofossils

Collection methods: 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

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 151500: authorized by Carlos Jaramillo, entered by Juan Carrillo on 04.10.2013, edited by Evangelos Vlachos, Miranta Kouvari, Grace Varnham, Philip Mannion and Kateryn Pino

Creative Commons license: CC BY (attribution)

Taxonomic list

 Salientia - Ceratophrynidae
Lepidobatrachus sp.5 Budgett 1899 Budgett's frog
GHUNLPam 8633, incomplete right maxilla
 Didelphimorphia - Didelphidae
 Sparassodonta - Proborhyaenidae
"Achlysictis cf. lelongi" = Thylacosmilus atrox
"Achlysictis cf. lelongi" = Thylacosmilus atrox Riggs 1933 metatherian
 Theriamorpha - Dasypodidae
Proeuphractus sp.2 Ameghino 1886 armadillo
Macrochorobates scalabrinii2 Moreno and Mercerat 1891 armadillo
Euphractini indet.10 Winge 1923 armadillo
Euphractini incertae sedis
Chorobates villosissimus2 Reig 1958 armadillo
Macroeuphractus morenoi2 Rovereto 1914 armadillo
Doellotatus inornatus2 Rovereto 1914 armadillo
Chasicotatus ameghinoi2 Scillato-Yané 1977 armadillo
Zaedyus pichiy2 Desmarest 1804 pichi
 Theriamorpha -
Coscinocercus sp.7 Cabrera 1939 edentate
Aspidocalyptus castroi7 Cabrera 1939 edentate
  - Mylodontidae
Proscelidodon gracillimus3 Rovereto 1914 edentate
GHUNLPam 9151
 Notoungulata - Hegetotheriidae
Tremacyllus impressus8 Ameghino 1888 notoungulate
GHUNLPam 8195-6, 8642
Paedotherium minor9 Cabrera 1937 notoungulate
GHUNLPam 812
 Notoungulata - Mesotheriidae
"Typotheriopsis silveyrai" = Typotheriopsis chasicoensis9 Cabrera and Kraglievich 1931 notoungulate
GHUNLPam 9154
Pseudotypotherium subinsigne9 Rovereto 1914 notoungulate
 Rodentia - Chinchillidae
Lagostomus telenkechanum4 Rasia and Candela 2017 viscacha
GHUNLPam 5824 right mandible with i and p4, GHUNLPam 5874 right mandible with broken i and p4-m2.
Lagostomus pretrichodactyla4 Rovereto 1914 viscacha
GHUNLPam 5822 left mandible with p4-m3, GHUNLPam 5823 left mandible with p4-m3, GHUNLPam 14710 left mandible with i and p4-m3.
 Rodentia - Abrocomidae
Protabrocoma antiqua7 Rovereto 1914 chinchilla rat
 Rodentia -
Neophanomys pristinus11 Verzi et al. 2011 caviomorph
GHUNLPam 2948 - Neophanomys biplicatus according to ref 70240
 Rodentia - Echimyidae
Reigechimys plesiodon7 Verzi et al. 1994 spiny rat
 Rodentia - Octodontidae
Phtoramys hidalguense7 Pascual et al. 1965 caviomorph
Metacaremys calfucalel6 Piñero et al. 2021 caviomorph
GHUNLPam 6663, 8552, 14372, 14374, 19119, 22760
 Tinamiformes - Tinamidae
Nothura sp.1 Wagler 1827 tinamou
GHUNLPam 27042, distal portion of right humerus, GHUNLPam 5901/1, proximal portion of left tarsometatarsus, GHUNLPam 5901/2, distal portion of right tarsometatarsus