Gregorymys veloxikua, The Oldest Pocket Gopher (Rodentia: Geomyidae), and The Early Diversification of Geomyoidea

Jiménez-Hidalgo, Eduardo; Guerrero-Arenas, Rosalía; Smith, Krister T.

doi:10.1007/s10914-017-9383-z

Cited by 18 publications

(38 citation statements)

References 14 publications

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“…had been collected inside burrows, which were tentatively identified as Alezichnos isp. [6]; however, further detailed study on these burrows suggested that these structures were much more complex than Alezichnos.…”

Section: Introductionmentioning

confidence: 90%

“…Lithological units represent a fluviolacustrine succession with several paleosol horizons (Fig 2). Stratigraphical description of the study zone had previously been reported in detail [5][6][7].…”

Section: Geological Settingmentioning

confidence: 99%

“…and Florentiamyidae indet.) [5,6]. Yaviichnus is composed of chambers and burrow systems different and much larger from those produced by amphisbaenians.…”

Section: Potential Producers Of Yaviichnus Iniyooensismentioning

confidence: 99%

“…are the only taxa of fossorial rodents in Iniyoo Local Fauna, where their remains are as abundant as the burrows. No other fossorial vertebrate species was identified in the Yolomecatl outcrops to be considered as the main inhabitant and excavator of the burrow systems [5,6,22]. Some remains were found in burrows with active fillings, resulted from the behavior of backfilling; active fillings could be identified because they have the same lithology of the rock matrix, and in some cases are structureless.…”

Section: Potential Producers Of Yaviichnus Iniyooensismentioning

confidence: 99%

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

2020

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We describe a new complex burrow system produced by geomyids in southern Mexico. Yaviichnus inyooensis igen. isp. nov. is composed of main large chambers near the top of the paleosol, from which shafts showing different morphologies and orientations radiate, some of them ending in or connected to small deeper chambers. Gregorymys spp. is proposed as the producer based on its fossorial habits, abundance in the outcrops, presence of remains inside the burrows, and paired grooves in the walls, which are compatible with the traces of geomyid incisors. The complexity of these burrows attests to an extended underground life that would have been triggered by semiarid to arid conditions. Morphological complexity also suggests that the burrows were excavated and inhabited by more than one individual, indicating that Oligocene Gregorymys of southern Mexico would be a unique gregarious geomyid.

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Section: Introductionmentioning

confidence: 90%

Section: Geological Settingmentioning

confidence: 99%

“…and Florentiamyidae indet.) [5,6]. Yaviichnus is composed of chambers and burrow systems different and much larger from those produced by amphisbaenians.…”

Section: Potential Producers Of Yaviichnus Iniyooensismentioning

confidence: 99%

Section: Potential Producers Of Yaviichnus Iniyooensismentioning

confidence: 99%

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

2020

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“…The record from Oaxaca is the southernmost occurrence of Gregorymys in North America (Jiménez-Hidalgo et al, 2018a). Besides G. veloxikua, another closely related gopher is present in the Iniyoo Local Fauna.…”

Section: Introductionmentioning

confidence: 90%

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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Biomechanical adaptations for burrowing in the incisor enamel microstructure of Geomyidae and Heteromyidae (Rodentia: Geomyoidea)

Kalthoff

Mörs

2021

Ecology and Evolution

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Gregorymys veloxikua, The Oldest Pocket Gopher (Rodentia: Geomyidae), and The Early Diversification of Geomyoidea

Cited by 18 publications

References 14 publications

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

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

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

Biomechanical adaptations for burrowing in the incisor enamel microstructure of Geomyidae and Heteromyidae (Rodentia: Geomyoidea)

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