Late middle Miocene Metatheria (Mammalia: Didelphimorphia and Paucituberculata) from Juan Guerra, San Martín Department, Peruvian Amazonia

Stutz, Narla Shannay; Abello, M. Alejandra; Marivaux, Laurent; Boivin, Myriam; Pujos, François; Benites-Palomino, Aldo M.; Salas‐Gismondi, Rodolfo; Tejada-Lara, Julia V.; Custódio, Michele Andriolli; Roddaz, Martín; Santos, Roberto Ventura; Ribeiro, Ana María; Antoine, Pierre‐Olivier

doi:10.1016/j.jsames.2022.103902

Cited by 11 publications

(14 citation statements)

References 89 publications

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“…1O-P). These few aforementioned dental and postcranial specimens of caviomorph rodents, together with numerous other dental specimens, have allowed to report a typical rodent community illustrating the Laventan SALMA (South American Land Mammal Age), i.e., late Middle Miocene (Marivaux et al, 2020;Boivin et al, 2021;Stutz et al, 2022). This rodent fauna from Peruvian Amazonia (TAR-31) is strikingly similar to that recorded farther north in Colombia, at La Venta (Walton, 1990(Walton, , 1997.…”

Section: Introductionmentioning

confidence: 80%

“…The fossil bearing locality, named TAR-31 (Tarapoto locus n°31) is situated beneath the Puente de Colombia, and consists of a 15 cm-thick microconglomerate. Wet-screening operations of 550 kg of sediments have yielded a diverse assemblage of aquatic and terrestrial vertebrates, including fishes, anurans, turtles, crocodiles, a small passerine bird, and mammals such as marsupials (Stutz et al, 2022), hoofed mammals, xenarthrans, a sirenian, bats, a primate (Marivaux et al, 2020), and rodents (Boivin et al, 2021). The fossil material consists primarily of bone fragments and tens of isolated teeth (and few fragments of mandibles and maxillae preserving teeth).…”

Section: Introductionmentioning

confidence: 99%

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3D models related to the publication: Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia.

Boivin¹,

Marivaux²,

Salas‐Gismondi³

et al. 2023

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Section: Introductionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

3D models related to the publication: Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia.

Boivin¹,

Marivaux²,

Salas‐Gismondi³

et al. 2023

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“…In turn, the genus Thylamys is known from the Middle Miocene of the Neotropics, La Venta, Colombia (Goin 1997) and Juan Guerra (TAR 31 locality), Peru (Stutz et al . 2022), while its Late Miocene to Pliocene distribution is wider, including Cerro Azul and Monte Hermoso fms in the Pampean Region (e.g. Mones 1980; Tonni 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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“…2017a, 2017b, 2018; for marsupials, see Stutz et al . 2022). Most fossils found in association with the present specimens, however, have continental affinities (Table 1), either aquatic (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…2021; Stutz et al . 2022). Those Miocene deposits have been associated with the lower member of the Ipururo Formation (Hermoza et al .…”

Section: Palaeontological and Geological Settingsmentioning

confidence: 99%

First Eocene–Miocene anuran fossils from Peruvian Amazonia: insights into neotropical frog evolution and diversity

Jansen,

Gómez,

Fouquet

et al. 2023

Papers in Palaeontology

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Anurans are one of the most diverse vertebrate groups, particularly in Amazonia, where species richness exceeds that of anywhere else. Amazonian frogs belong to three main lineages (Hyloidea, Microhylidae and Pipidae), each of which diversified during the Cenozoic. However, due to the virtual absence of an anuran fossil record in that area, the evolutionary history of modern lineages has so far remained accessible only via molecular data. In recent decades, a series of field campaigns in Peruvian Amazonia led to the discovery of an unparalleled set of anuran bone fragments, scattered across different sites spanning the Eocene–Miocene time interval. Here, we describe these first Palaeogene and early Neogene anurans from Peru with a focus on humeral and ilial morphology, identifying five humeral and five ilial morphotypes. Humeral morphotypes suggest the presence of different lineages of Brachycephaloidea in Peruvian fossil assemblages, whereas ilial morphotypes suggest the presence of Leptodactylidae, although leptodactylid‐like ilia also occur in some extant brachycephaloids. Pipids were also identified based on both humeral and ilial fragments. This study fills a major temporal and geographical gap in the evolutionary history of South American anurans, while further uncovering a lack of knowledge in the skeletal morphology of extant anuran families, as well as their inter‐ and intra‐species variability.

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Late middle Miocene Metatheria (Mammalia: Didelphimorphia and Paucituberculata) from Juan Guerra, San Martín Department, Peruvian Amazonia

Cited by 11 publications

References 89 publications

3D models related to the publication: Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia.

3D models related to the publication: Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia.

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

First Eocene–Miocene anuran fossils from Peruvian Amazonia: insights into neotropical frog evolution and diversity

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