First record of Tetrastylus Ameghino, 1886 (Rodentia; Dinomyidae) from the Upper Miocene of Uruguay

Rinderknecht, Andrés; Gutiérrez, Martín Ubilla; Beron, Aldo S. Manzuetti; Toriño, Pablo; Negreira, Daniel Perea

doi:10.4072/rbp.2019.1.03

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Perea & Scillato‐Yané 1995; Ubilla & Rinderknecht 2003; Toriño & Perea 2018; Rinderknecht et al . 2019; Soibelzon et al . 2019; Rasia 2023), with an 87 Sr/ 86 Sr age interval of 7.20–6.0 Ma dated from the Cantera Geymonat locality (del Río et al .…”

Section: Discussionmentioning

confidence: 99%

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.

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Section: Discussionmentioning

confidence: 99%

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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Taxonomic and ontogenetic diversity of Dinomyidae (Rodentia) from the late Miocene-early Pliocene of La Pampa province (Argentina) based on cranio-dental remains

Sostillo

Cardonatto

Kerber

et al. 2022

Journal of South American Earth Sciences

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Dinomyid (Rodentia, Caviomorpha) diversity from the Late Miocene (Chasicoan Stage/Age) Cerro Azul Formation at the classical Arroyo Chasicó locality (Argentina)

Rasia,

Montalvo,

Sostillo

et al. 2024

Historical Biology

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First record of Tetrastylus Ameghino, 1886 (Rodentia; Dinomyidae) from the Upper Miocene of Uruguay

Abstract: The first record for Uruguay of the dinomyid rodent Tetrastylus Ameghino, an almost complete right mandible from the upper Miocene Camacho Formation, is described. According to the p4 and m3 morphology it is inferred a juvenile-subadult ontogenetic stage for this specimen.

Cited by 3 publications

References 18 publications

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

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

Taxonomic and ontogenetic diversity of Dinomyidae (Rodentia) from the late Miocene-early Pliocene of La Pampa province (Argentina) based on cranio-dental remains

Dinomyid (Rodentia, Caviomorpha) diversity from the Late Miocene (Chasicoan Stage/Age) Cerro Azul Formation at the classical Arroyo Chasicó locality (Argentina)

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