Also known as SG
Where: La Pampa, Argentina (37.2° S, 63.6° W: paleocoordinates 37.4° S, 61.3° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Cerro Azul Formation, Huayquerian (8.0 - 5.0 Ma)
• The Cerro Azul Formation outcrops are located in the north-western, central, and eastern part of La Pampa province and adjacent western Buenos Aires province, Argentina (Linares, Llambías & Latorre, 1980; Folguera & Zárate, 2009; Visconti et al., 2010). The unit is characterized by a monotonous succession of loess containing moderately developed paleosols (Fig. 4) that has been assigned to the late Miocene (Huayquerian Land Mammal age) essentially on the basis of its mammal remains (Montalvo & Casadío, 1988; Verzi, Montalvo & Vucetich, 1999; Verzi, Montalvo & Tiranti, 2003). In particular, the formation is considered as representing the interval between 10 and 5.7 Ma (Cione et al., 2000; Verzi, Montalvo & Deschamps, 2008)
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•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). 6.609 Ma (6.324 - 7.045 Ma) for Salinas Grandes de Hidalgo.
• group of beds-level stratigraphic resolution
Environment/lithology: fluvial; burrowed, muddy, sandy siltstone
Size classes: macrofossils, mesofossils
Collection methods: Fossil remains from La Pampa province collected during this study are housed at the Paleontological Collection of the Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Santa Rosa city, La Pampa, Argentina, under the acronym GHUNLPam
•Field work was approved by the Dirección Provincial de Museos y Preservación Patrimonial, under the Project ‘‘Vertebrados del Mioceno tardío-Plioceno en el área de las lagunas encadenadas del oeste de la provincia de Buenos Aires. Aportes a la bioestratigrafía del Cenozoico tardío de la Región Pampeana’’, permit nr. 2015-3-P-156-2.
Primary reference: M. C. Cardonatto and R. N. Melchor. 2018. Large mammal burrows in late Miocene calcic paleosols from central Argentina: paleoenvironment, taphonomy and producers. PeerJ 6:e4787 [P. Mannion/M. Kouvari]more details
Purpose of describing collection: taphonomic analysis
PaleoDB collection 206031: authorized by Philip Mannion, entered by Miranta Kouvari on 29.10.2019, edited by Grace Varnham, Kateryn Pino, Franco Aspromonte and Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
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Lagostomus pretrichodactyla4 Rovereto 1914 viscacha GHUNLPam 82 left maxilla with P4-M3, GHUNLPam 6115 left mandible with p4-m2, GHUNLPam 6200 right maxilla with M1-3, GHUNLPam 14491 palate with left P4-M3 and right P4-M1, MLP-PV- 65-VII-29-72 palate with right and left P4-M3.
Lagostomus telenkechanum4 Rasia and Candela 2017 viscacha GHUNLPam 83 right maxilla with P4-M1, GHUNLPam 126 right mandible with p4-m3, GHUNLPam 192 right mandible with p4-m4, GHUNLPam 6206 right mandible with p4-m1, GHUNLPam 18433 right mandible with m1-3
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Cyonasua longirostris2 Rovereto 1914 procyonid carnivore GHUNLPam 14367, GHUNLPam 8775, MLP 87-XI-20-2, MLP 65-VII -29-86
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Glyptodontidae indet. Burmeister 1879 glyptodon | |