The Quequén Salado river basin: Geology and biochronostratigraphy of the Mio-Pliocene boundary in the southern Pampean plain, Argentina

Beilinson, Elisa; Gasparini, Germán Mariano; Tomassini, Rodrigo Leandro; Zárate, Marcelo; Deschamps, Cecilia Marcela; Barendregt, René W.; Rabassa, Jorge

doi:10.1016/j.jsames.2017.04.002

Cited by 25 publications

(27 citation statements)

References 22 publications

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“…3), constrained by paleomagnetic data and numerical ages (Deschamps, 2005;Tomassini et al, 2013;Deschamps and Tomassini, 2016). This rodent was found in Cantera Vialidad (Bahía Blanca), among other localities, where the bearing level is constrained by a dating of 5.28±0.04 Ma (Schultz et al, 2006;Folguera and Zárate, 2009;see Deschamps andTomassini, 2016, andBeilinson et al, 2017 for updating data on rodent record correlations and stratigraphic interpretations).…”

Section: Discussionmentioning

confidence: 96%

“…In turn, Xenodontomys ellipticus was recorded at Paso del Médano , Paso del Halcón, Paso de la Tufa (Pardiñas et al, in press), and Paso del Indio Rico Beilinson et al, 2017). P. tripotamicus has not been recorded either in AUB or in the type localities of the Montehermosan and Chapalmalalan, both with large collections of mammals.…”

Section: Discussionmentioning

confidence: 99%

“…Beilinson et al (2017) divided the sedimentary record into two allostratigraphic units informally named AUA (lower) and AUB (upper), bounded by a stratigraphic discontinuity exposed at Paso del Indio Rico.…”

Section: Discussionmentioning

confidence: 99%

“…AUB was recognized in several localities of the Quequén Salado River (Beilinson et al, 2017). In this unit, numerous taxa were found, such as Eumysops laeviplicatus Ameghino, from Paso del Indio Rico, which is a key taxon for the Montehermosan, but this specimen has no precise stratigraphic provenance Vucetich et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the new interpretation of the origin of the "Irenense" sediments (Beilinson et al, 2015(Beilinson et al, , 2017 of some lineages of rodents, the biostratigraphic distribution of the marsupial caenolestine Pliolestes tripotamicus Reig, 1955, and hence that of the whole genus, is presented herein. This Argentinean caenolestid is included in the Subfamily Caenolestinae (Goin et al, 2009) These data are not precise enough to establish the type locality of this taxon.…”

Section: Pliolestes Tripotamicusmentioning

confidence: 94%

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Biostratigraphic Reassignment of the Neogene Caenolestines (Marsupialia) of the Pampean Region: The Case of Pliolestes Tripotamicus Reig, 1955

Deschamps

Gasparini

Beilinson

et al. 2017

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Pliolestes Tripotamicusmentioning

confidence: 94%

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Biostratigraphic Reassignment of the Neogene Caenolestines (Marsupialia) of the Pampean Region: The Case of Pliolestes Tripotamicus Reig, 1955

Deschamps

Gasparini

Beilinson

et al. 2017

PEAPA

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Evolutionary pattern of Metacaremys gen. nov. (Rodentia, Octodontidae) and its biochronological implications for the late Miocene and early Pliocene of southern South America

Piñero

Verzi

Olivares

et al. 2021

Papers in Palaeontology

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We analyse the taxonomic status and diversity of the late Miocene Octodontoidea (Hystricognathi) Cercomys primitiva and related samples, a taxon previously known only from the holotype specimen. New findings associated with an extensive review of late Miocene and early Pliocene rodents have allowed us to recognize the occurrence of this and other related species in several localities of central and western Argentina, and in south‐central Bolivia. We discuss the invalidity of Cercomys and propose the new genus Metacaremys, which includes the type species Metacaremys primitiva comb. nov. and two new species, Metacaremys calfucalel sp. nov. and Metacaremys dimi sp. nov. Osteological, brain and dental morphology show that the new genus is not related to Brazilian Echimyidae, as previously considered, but to the southern family Octodontidae. Although the molar morphology of this genus is quite conservative, comparison of the samples shows a variation in size. We discuss the plausible evolutionary pattern explaining this variation and the implied biochronological and biostratigraphical information. It is recognized as an anagenetic lineage in which an increase in size occurs from the oldest species, M. primitiva comb. nov. (early late Miocene, c. 9.23 Ma), to the youngest species, M. dimi sp. nov. (Miocene–Pliocene boundary, c. 5.28 Ma). Metacaremys calfucalel is intermediate in size and age between these two species. The polarity of this pattern of change is consistent with that shown by other partially synchronous independent lineages of octodontoids, thus providing new evidence for the biochronological and biostratigraphic scheme of the late Miocene and early Pliocene of southern South America.

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Redefining the Huayquerian Stage (Upper Miocene to Lower Pliocene) of the South American chronostratigraphic scale based on biostratigraphical analyses and geochronological dating

Romano,

Garrido,

Barbeau

et al. 2023

Papers in Palaeontology

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The Huayquerian Stage of the South American chronostratigraphic scheme (named for the Huayquerías del Este, Argentina) was originally based on a poorly known mammal association of six taxa from the Huayquerías Formation. We studied the geology, age and fauna of the Neogene sequence in this area, including the Huayquerías, Tunuyán and Bajada Grande formations. The sequence comprises a monotonous succession of synorogenic epiclastic sediments deposited under arid to semi‐arid conditions. Zircon U–Pb dates from 10 tuffaceous levels (7.2–1.6 Ma) place deposition of the Huayquerías Formation during the late Tortonian or Messinian to early Zanclean, the Tunuyán Formation during the Zanclean–Piacenzian, and the Bajada Grande Formation during the Piacenzian–Calabrian. We present 43 and 31 new mammal taxon records for the Huayquerías and Tunuyán formations, respectively. Progressive faunal change was observed along the sequence. The first records of the Chaco tortoise Chelonoidis chilensis and the notoungulate Xotodon major, and the latest records of Interatheriidae and Typotheriopsis (notoungulates), Metacaremys calfucalel, Phtoramys hidalguense and Lagostomus pretrichodactyla (rodents), Chasicotatus ameghinoi and Macroeuphractus morenoi (xenarthrans) are reported. The faunal associations of the Huayquerías and lower Tunuyán formations are highly similar to each other, and to other coeval localities in Argentina. The Macroeuphractus morenoi Assemblage Biozone is proposed as the basis for redefining the Huayquerian Stage, due to the co‐occurrence of three taxa with wide geographical distribution in southern South America: Macroeuphractus morenoi, Pseudotypotherium subinsigne and Lagostomus pretrichodactyla. The age of this biozone is constrained at c. 8–5 Ma in its type area.

show abstract

The Quequén Salado river basin: Geology and biochronostratigraphy of the Mio-Pliocene boundary in the southern Pampean plain, Argentina

Cited by 25 publications

References 22 publications

Biostratigraphic Reassignment of the Neogene Caenolestines (Marsupialia) of the Pampean Region: The Case of Pliolestes Tripotamicus Reig, 1955

Biostratigraphic Reassignment of the Neogene Caenolestines (Marsupialia) of the Pampean Region: The Case of Pliolestes Tripotamicus Reig, 1955

Evolutionary pattern of Metacaremys gen. nov. (Rodentia, Octodontidae) and its biochronological implications for the late Miocene and early Pliocene of southern South America

Redefining the Huayquerian Stage (Upper Miocene to Lower Pliocene) of the South American chronostratigraphic scale based on biostratigraphical analyses and geochronological dating

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