Salinas Grandes de Hidalgo (Miocene of Argentina)

Where: La Pampa, Argentina (37.2° S, 63.6° W: paleocoordinates 37.4° S, 61.3° W)

• coordinate based on nearby landmark

When: Epecuén Formation, Huayquerian (9.0 - 6.8 Ma)

• Schmidt et al. 2018: Late Miocene deposits in La Pampa Province are very extensive and grouped into the Cerro Azul Formation (Linares et al., 1980; Folguera and Zarate, 2009), including the “Epecuen Formation” in west of Buenos Aires Province (sensu Pascual, 1961, Goin et al., 2000). Figure 2 illustrates the stratigraphic distribution of the locality giving a general age estimate of 6.6-7.2Ma.

Environment/lithology: fluvial; lithified, brown siltstone

• Schmidt et al. 2018: At Laguna Chillhué and Salinas Grandes de Hidalgo, fluvial and eolian deposits are intercalated (Deschamps et al., 2013; Mehl and Zarate, 2014).

Size class: macrofossils

Collection methods: Museo de La Plata collection

•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: S. F. Vizcaíno and R. A. Fariña. 1999. On the flight capabilities and distribution of the giant Miocene bird Argentavis magnificens (Teratornithidae). Lethaia 32(4):271-278 [J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 87198: authorized by John Alroy, entered by John Alroy on 09.03.2009, edited by Juan Carrillo, Evangelos Vlachos, Grace Varnham and Miranta Kouvari

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Pantestudinidae
Testudinidae indet.1 Batsch 1788 turtle
MLP
Aves
 Cathartiformes - Cathartidae
Argentavis magnificens n. gen. n. sp.
Argentavis magnificens n. gen. n. sp. Campbell and Tonni 1980 teratorn
 Tinamiformes - Tinamidae
Eudromia sp. Geoffroy 1832 tinamou
Mammalia
 Notoungulata - Toxodontidae
Pisanodon nazari Cabrera and Kraglievich 1931 notoungulate
 Notoungulata - Hegetotheriidae
Paedotherium minor Cabrera 1937 notoungulate
 Notoungulata - Typotheriidae
Pseudotypotherium carhuense Cabrera 1939 notoungulate
 Rodentia - Chinchillidae
Lagostomus sp. Brookes 1828 viscacha
 Rodentia - Dinomyidae
Tetrastylus araucanus Ameghino 1904 caviomorph
 Rodentia - Hydrochoeridae
Hydrochoeridae indet.3 Gill 1872 caviomorph
 Rodentia - Caviidae
Orthomyctera sp. Ameghino 1889 caviomorph
Cardiomys sp. Ameghino 1885 caviomorph
Palaeocavia sp. Ameghino 1889 caviomorph
 Rodentia - Octodontidae
 Rodentia - Abrocomidae
Abrocoma cf. antiqua chinchilla rat
 Rodentia - Echimyidae
Reigechimys octodontiformis Verzi et al. 1994 spiny rat
Pampamys emmonsae Verzi et al. 1995 spiny rat
 Carnivora - Procyonidae
Cyonasua brevirostris procyonid carnivore
Cyonasua prebrevirostris procyonid carnivore
 Cingulata - Dasypodidae
Proeuphractus sp.3 Ameghino 1886 armadillo
Chorobates villosissimus Reig 1958 armadillo
Macroeuphractus morenoi Rovereto 1914 armadillo
Paleuphractus sp. Kraglievich 1934 armadillo
Doellotatus chapadmalensis Bordas 1932 armadillo
Chasicotatus ameghinoi2 Scillato-Yané 1979 armadillo
Macrochorobates scalabrinii Moreno and Mercerat 1891 armadillo
 Xenarthra - Megatheriidae
Plesiomegatherium sp. Roth 1911 edentate
 Xenarthra - Mylodontidae
 Xenarthra - Glyptodontidae
Plohophorus araucanus Ameghino 1904 glyptodon
"Hoplophractus tapinocephalus" = Eosclerocalyptus glyptodon
 Ungulata - Macraucheniidae
Promacrauchenia sp. Ameghino 1904 eutherian
 Ungulata - Proterotheriidae
Diplasiotherium pampa4 Soria 2001 eutherian
cf. Brachytherium cuspidatum4 Ameghino 1883 eutherian
Neobrachytherium sp.4 Soria 2001 eutherian
 Sparassodonta - Thylacosmilidae
"Achlysictis cf. lelongi" = Thylacosmilus atrox
"Achlysictis cf. lelongi" = Thylacosmilus atrox Riggs 1933 metatherian
 Sparassodonta -
Borhyaenidium musteloides n. gen. n. sp. Pascual and Bocchino 1963 metatherian
MLP 57-X-10-153, skull and postcrania, holotype
 Didelphimorphia - Didelphidae
Lutreolina sp. Thomas 1910 lutrine opossum
Thylatheridium dolgopolae Reig 1952 opossum
Thylatheridium hudsoni Goin and Montalvo 1988 opossum
"Thylamis sp." = Thylamys Gray 1843 fat-tailed mouse opossum