A new chinchilloid (Rodentia, Hystricognathi) from the early Miocene of the localities of Bryn Gwyn and Gran Barranca (Patagonia, Argentina)

Busker, Felipe; Pérez, María Encarnación; Dozo, María Teresa

doi:10.1016/j.crpv.2019.05.003

Cited by 9 publications

(13 citation statements)

References 31 publications

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“…There is no general consensus on the phylogenetic relationships of the families within Chinchilloidea, not even on the composition of the clade, given that some authors do not recognize Cephalomyidae as belonging to Chinchilloidea (e.g. Busker et al, 2019; but see Busker et al, 2020), and even several authors recognize the giant hutias (Heptaxodontidae) as closely related to chinchilloid families (e.g. MacPhee, 2011;Marivaux et al, 2020; but see Woods et al, 2021).…”

Section: Overview Of Phylogenetic Studies On Chinchilloideamentioning

confidence: 99%

“…Kerber & Sánchez-Villagra, 2019), newly described taxa (e.g. Boivin et al, 2017b;Busker et al, 2019;Kramarz et al, 2013;Marivaux et al, 2020;Vucetich et al, 2015), and phylogenetic analyses (e.g. Boivin et al, 2019a;Busker et al, 2019Busker et al, , 2020Kerber et al, 2016;Kramarz, 2001bKramarz, , 2005Kramarz et al, 2013;Rasia & Candela, 2018, 2019a that have contributed immensely to the understanding of the group.…”

Section: Introductionmentioning

confidence: 99%

“…Incamys (late Oligocene of Bolivia and Argentina;e.g. Hofstetter & Lavocat, 1970;Vucetich et al, 2015), Garridomys (early Miocene of Argentina;Kramarz et al, 2013), Loncolicu (late Oligocene of Argentina;Vucetich et al, 2015) and Saremmys (early Miocene of Argentina;Busker et al, 2019) were recognized as Chinchilloidea closely related to Chinchillidae (Busker et al, 2019;Kramarz et al, 2013;Rasia & Candela, 2019a;Vucetich et al, 2015) and some of them (i.e. Incamys and Garridomys) are recovered as stem Chinchillidae (Rasia & Candela, 2019a) or stem Chinchilloidea (Boivin et al, 2019a) in recent phylogenies.…”

Section: Introductionmentioning

confidence: 99%

“…Scotamys (late Oligocene of Argentina;Loomis, 1914) was considered as closely related to Cephalomyidae and to the neoepiblemid Perimys (Kramarz, 2001b;Wood & Patterson, 1959), and recent studies shows it as closely related to both Chinchillidae and Neoepiblemidae, along with Incamys and Garridomys (e.g. Busker et al, 2019Busker et al, , 2020.…”

Section: Introductionmentioning

confidence: 99%

“…Rasia & Candela, 2019a; see also Kramarz et al, 2013), as a stem Chinchilloidea (Boivin et al, 2019a), or basal to Chinchillidae+Neoepiblemidae (e.g. Busker et al, 2019;Kerber et al, 2017Kerber et al, , 2020. The fossil record of Chinchillinae is scarce, restricted to yet undescribed remains from the early Miocene of Chile (Flynn et al, 2002) and middle Miocene of Bolivia (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive total evidence phylogeny of chinchillids (Rodentia, Caviomorpha): Cheek teeth anatomy and evolution

2021

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Rodents are the most diverse order of extant mammals, and caviomorph rodents, or New World hystricognaths, have a remarkable morphological disparity and a long fossil record that begins in the Eocene. Chinchilloidea is a poorly understood clade within Caviomorpha, from an evolutionary and phylogenetic perspective. It includes the extant families Chinchillidae and Dinomyidae, the extinct Neoepiblemidae and Cephalomyidae, and several extinct chinchilloids without a clear phylogenetic position, like Eoincamys, Borikenomys, Chambiramys, Ucayalimys, Incamys, Saremmys, Garridomys and Scotamys. The family Chinchillidae includes the extant Chinchilla and Lagidium, grouped in Chinchillinae, and the only living Lagostominae, Lagostomus maximus. Among extinct chinchillids, Eoviscaccia (early Oligocene-early Miocene of Argentina, Bolivia and Chile), Prolagostomus (early-middle Miocene of Argentina, Bolivia and Chile) and Pliolagostomus (early-middle Miocene of Argentina) are the only genera originally described as members of the family. Based on the study of specimens with unworn or little-worn cheek teeth, belonging to extinct and extant taxa, we propose homologies of the cheek teeth structures and perform a combined molecular and morphological phylogenetic analysis including extinct and extant taxa of all families of Chinchilloidea and all genera of Chinchillidae. Our phylogenetic analysis recovered three major lineages in the evolutionary history of Chinchilloidea. The first major lineage is composed of the extant taxa Chinchilla, Lagidium and Lagostomus, and the extinct genera Eoviscaccia, Prolagostomus, Pliolagostomus, Garridomys, Incamys, Loncolicu and Saremmys. Cephalomyid (Banderomys, Cephalomys, Litodontomys, Soriamys) and neoepiblemid (Neoepiblema, Perimys, Phoberomys, Scotamys) genera are part of the second major lineage, while dinomyids such as Dinomys, Drytomomys, Scleromys, 'Scleromys' and Tetrastylus constitute the third major lineage within Chinchilloidea. The phylogenetic position of some taxa previously considered as incertae sedis chinchilloids or without a clear suprageneric group (i.e. Incamys, Saremmys, Garridomys and Loncolicu) show that they belong to pan-Chinchillidae and conform the stem Chinchillidae along with Eoviscaccia. The euhypsodont crown Chinchillidae includes the living subfamilies Chinchillinae and Lagostominae. Dinomyidae and Eoincamys pascuali are recovered as the sisters of a major clade composed by 'Cephalomyidae'+Neopiblemidae and pan-Chinchillidae, and Chambiramys sylvaticus occupies a basal position to the same clade. Four major radiation events are identified in the evolutionary history of Chinchilloidea. The analysis of new morphological characters linked with molecular

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