Burrow systems evince non-solitary geomyid rodents from the Paleogene of southern Mexico

Guerrero-Arenas, Rosalía; Jiménez-Hidalgo, Eduardo; Genise, Jorge Fernando

doi:10.1371/journal.pone.0230040

Cited by 12 publications

(4 citation statements)

References 34 publications

(65 reference statements)

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“…Two uranium–lead dating maximum depositional ages of 30.6 ± 0.77 and 30.62 ± 0.67 Ma, for detrital zircon grains from sandstone beds occurring above the bottom and top of the vertebrate fossil-bearing interval, indicate an early Oligocene age for the formation (Guerrero-Arenas et al . 2020; Jiménez-Hidalgo et al . 2021).…”

Section: Study Areasmentioning

confidence: 99%

First Mexican records of Anthracotheriidae (Mammalia: Artiodactyla)

Jiménez-Hidalgo

Carbot-Chanona

2023

Earth and Environmental Science Transactions of the Royal Society of Edinburgh

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Anthracotheres are generalised artiodactyls that have an extensive record in the Cenozoic of Eurasia and Africa. In North America they have been collected in middle Eocene to early Miocene localities from the California Coast, the Great Plains and the Gulf Coast of the United States, with a single record from the early Miocene of Panama. Here we report few specimens from the early Oligocene (Ar1) Iniyoo Local Fauna of north-western Oaxaca, and the earliest Miocene of Simojovel de Allende, in northern Chiapas. This material has diverse features that indicate they belonged to the bothriodontine Arretotherium, such as selenodont cristids associated with the protoconid and hypoconid, the absence of a premetacristid, and the crenulated enamel. They share with Arretotherium acridens and Arretotherium meridionale the absence of a mesiolingual metacristid, but their general morphology and size indicate a close relationship to Ar. meridionale. Nevertheless, in absence of better-preserved specimens, we decided not to assign the fossil material to this species. Specimens from Oaxaca and Chiapas are the first records of anthracotheres in Mexico. These new records link the previous ones from temperate North America and tropical Central America and indicate that Anthracotheriidae had a very wide geographical distribution in North America during the Palaeogene and the Neogene. Additionally, they represent the southern-most records of Arretotherium in North America during the Oligocene and the early Miocene.

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Section: Study Areasmentioning

confidence: 99%

First Mexican records of Anthracotheriidae (Mammalia: Artiodactyla)

Jiménez-Hidalgo

Carbot-Chanona

2023

Earth and Environmental Science Transactions of the Royal Society of Edinburgh

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“…The fossiliferous sediments and associated fauna (Iniyoo Local Fauna) were initially regarded as late Eocene (Jiménez-Hidalgo et al, 2015) or middle Eocene (Ferrusquía-Villafranca et al, 2016) in age. A new U-Pb zircon maximum depositional age of 30.6 ± 0.77 Ma for a sandstone bed that is within the fossiliferous beds, as well as some of the associated mammals ( Cormocyon , Mammacyon , Oreodontoides , Archaeolagus , among others), indicate an Arikareean 1 North American Land Mammal Age (NALMA) (Guerrero-Arenas et al, 2020). An absolute age of 28–29 Ma for the Iniyoo Local Fauna is constrained by the First Appearance Datum of the amphicyonid Mammacyon and the Last Appearance Datums for the tayassuid Perchoerus probus and Subhyracodon (Jiménez-Hidalgo et al, 2018b).…”

Section: Geological Settingmentioning

confidence: 99%

“…In recent years, Gregorymys veloxikua Jiménez-Hidalgo, Guerrero-Arenas, and Smith, 2018a was described from the Santiago Yolomécatl area, in northwestern Oaxaca, southern Mexico. This species is part of the Iniyoo Local Fauna that was previously considered as late Eocene in age (Chadronian) (Jiménez-Hidalgo et al, 2015, 2018a; however, a maximum depositional U-Pb age and the recent identification of typical mammalian index taxa revealed that the age of this assemblage is early Oligocene, corresponding to the Arikareean 1 (Ar1) in the North American mammalian biochronology (Guerrero-Arenas et al, 2020).…”

Section: Introductionmentioning

confidence: 97%

A new species of the gopherGregorymys(Rodentia, Geomyidae) from the early Oligocene (Arikareean 1) of southern Mexico

2020

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A new species of gopher, Gregorymys mixtecorum n. sp., is described from the Arikareean 1 (early Oligocene) of Oaxaca, southern Mexico. Phylogenetic analysis indicates that it is the sister species of G. veloxikua, which was also recently described from southern Mexico. Both species were collected from sediments of the Chilapa Formation that crop out in northwestern Oaxaca. Gregorymys mixtecorum n. sp. and G. veloxikua show differences in size and proportions that possibly reduced competition for resources, exploiting different microhabitats. Both Mexican species represent the oldest and the most southern records of Gregorymys in North America. The Mexican record of Gregorymys suggests that at least some entoptychine rodents diversified in southern Mexico or Central America, and that Geomyidae has had a wide geographic distribution in North America since the early Oligocene. UUID: http://zoobank.org/0f4ad549-2f59-442b-87fa-5c9be0573ea4

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“…There have been considerable recent advancements in determining the locomotion of fossil rodents (Calede et al, 2019;Gobetz & Martin, 2006;Guerrero-Arenas et al, 2020;Jiménez-Hidalgo et al, 2018;Martin & Bennett, 1977;Samuels & Van Valkenburgh, 2008. These quantitative analyses have focused on the proportions of postcranial skeletons (e.g., Calede et al, 2019;Candela & Picasso, 2008;Carrizo et al, 2014;Elissamburu & de Santis, 2011;Elissamburu & Vizcaíno, 2004;Essner, 2007;Ginot et al, 2016;Lessa and Thaeler, 1989;Samuels & Van Valkenburgh, 2008) as well as the analyses of mostly complete skulls (Bertrand et al, 2016;Calede et al, 2019;Samuels & Van Valkenburgh, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ecological correlates of the morphology of the auditory bulla in rodents: Application to the fossil record

Scarpitti

Calede

2021

Journal of Anatomy

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The fossil record provides a fantastic laboratory to explore the effects of past climatic and environmental changes on biodiversity and morphology (Barnosky et al., 2003;Blois & Hadly, 2009;Dietl & Flessa, 2011). Rodents are of particular interest because of their high taxonomic diversity during the Cenozoic (Samuels & Hopkins, 2017); their small body size, short breeding cycles, and ecological adaptations make them helpful indicators of environmental change (Chaline, 1977). One group of rodents that is expected to closely track the environment through time is fossorial rodents (e.g., Calede et al., 2011); a group of animals whose distribution and abundance is dependent on soil and environmental characteristics (e.g., Lazo-

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Burrow systems evince non-solitary geomyid rodents from the Paleogene of southern Mexico

Cited by 12 publications

References 34 publications

First Mexican records of Anthracotheriidae (Mammalia: Artiodactyla)

First Mexican records of Anthracotheriidae (Mammalia: Artiodactyla)

A new species of the gopherGregorymys(Rodentia, Geomyidae) from the early Oligocene (Arikareean 1) of southern Mexico

Ecological correlates of the morphology of the auditory bulla in rodents: Application to the fossil record

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