Cavioids, Chinchilloids, and Erethizontoids (Hystricognathi, Rodentia, Mammalia) of the Early Miocene Pampa Castillo Fauna, Chile

McGrath, Andrew J.; Chick, Jennifer; Croft, Darin A.; Dodson, Holly E.; Flynn, John J.; Wyss, André R.

doi:10.1206/3984.1

Cited by 7 publications

(19 citation statements)

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“…We performed a hierarchical clustering analysis including the Pampa Castillo rodent fauna as a whole (considering the data of McGrath et al . 2022 a and this work) and 10 other Early–Middle Miocene rodent assemblages. Coupled with geochronological data, this analysis refines the understanding of the biochronology of Early and Middle Miocene South American mammal faunas.…”

Section: Figmentioning

confidence: 55%

“…Drawing together the description and analyses of other components of the entire Pampa Castillo rodent fauna (McGrath et al . 2022 a ), with the taxa discussed above, we considered this fauna's taxonomic similarities to roughly contemporaneous faunas from elsewhere, as described earlier. This was done to assess the chronological and/or palaeoenvironmental inferences that can be drawn from faunal similarity coefficients.…”

Section: Resultsmentioning

confidence: 99%

“…However, similar to the other caviomorph rodents from this locality, no pattern in taxon presence or abundance is apparent across the different levels (McGrath et al . 2022 a ).…”

Section: Discussionmentioning

confidence: 99%

“…2019; McGrath et al . 2022 a ). Other ‘Pinturan’ rodent taxa, such as Eosteiromys and Branisamyopsis , are shared with older Colhuehuapian, but not Sa‐SC‐RSC + Sa‐SC‐AC faunas, while some rodent species are exclusive to ‘Pinturan’ faunas (Kramarz 2004, 2006 b ).…”

Section: Discussionmentioning

confidence: 99%

“…McGrath et al . (2022 a ) described the erethizontids, cavioids and chinchilloids from Pampa Castillo. Without fully assessing the fauna's biochronology, McGrath et al .…”

Section: Figmentioning

confidence: 99%

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Caviomorphs (Rodentia, Hystricognathi) from Pampa Castillo, Chile: new octodontoid records and biochronological implications

McGrath

Flynn

Croft

et al. 2023

Papers in Palaeontology

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Caviomorph rodents have been diverse and abundant components of South American mammal communities since the late Eocene. We describe herein the octodontoids of Pampa Castillo, a Lower Miocene site in southern Chile (Aysén Region). Six genera and seven species of octodontoids are present, two of which are new: Dudumus berggreni sp. nov. and Caviocricetus guenekko sp. nov. The octodontoids from Pampa Castillo support assignment of this fauna to the Santacrucian South American Land Mammal Age (SALMA), which is consistent with previous studies. We conducted similarity analyses on 11 Early–Middle Miocene Patagonian rodent faunas using hierarchical clustering. Faunas generally fell into the three SALMAs to which they were traditionally assigned: Colhuehuapian, Santacrucian and ‘post‐Santacrucian’. The ‘Pinturan’ is a proposed biochronological interval between the Colhuehuapian and Santacrucian. At the genus level, Pampa Castillo clustered with ‘Pinturan’ faunas, while at the species level it clustered with the ‘typical’ faunas on which the Santacrucian SALMA is based (from outcrops of the Santa Cruz Formation along the Atlantic coast and Río Santa Cruz). The Pampa Castillo rodent fauna resembles both ‘Pinturan’ and ‘typical’ Santacrucian faunas in taxon distributions, reflecting complex temporal and palaeoenvironmental influences. Geochronological data indicate that some ‘Pinturan’ sites overlap temporally with Pampa Castillo and the upper Pinturas Formation, which both clustered with ‘typical’ Santacrucian faunas. These results indicate that the ‘Pinturan’ does not represent a distinct biochronological interval, but that the differences between it and ‘typical’ Santacrucian faunas are attributable to geographic or palaeoenvironmental differences.

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Section: Figmentioning

confidence: 55%

Section: Resultsmentioning

confidence: 99%

“…However, similar to the other caviomorph rodents from this locality, no pattern in taxon presence or abundance is apparent across the different levels (McGrath et al . 2022 a ).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…McGrath et al . (2022 a ) described the erethizontids, cavioids and chinchilloids from Pampa Castillo. Without fully assessing the fauna's biochronology, McGrath et al .…”

Section: Figmentioning

confidence: 99%

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