A new early Miocene octodontoid rodent (Hystricognathi, Caviomorpha) from Patagonia (Argentina) and a reassessment of the early evolution of Octodontoidea

Arnal, Michelle; Kramarz, Alejandro Gustavo; Vucetich, Marı́a Guiomar; Vieytes, Emma Carolina

doi:10.1080/02724634.2013.808203

Cited by 34 publications

(60 citation statements)

References 25 publications

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“…Differences between the results obtained here and those from other recent phylogenetic analyses of fossil octodontoids (Arnal and Pérez 2013;Arnal et al 2014;Vucetich et al 2014;Arnal and Vucetich 2015) could be due in large part to the disparate representation of living species in the samples considered. Arnal and Pérez (2013: 129) interpreted Octodontidae as a group of modern (late Miocene) origin derived from an allegedly paraphyletic grouping BEchimyidae^represented by †Eumysops and †Stichomys; the octodontid Octomys mimax was the only living species included in this analysis.…”

Section: Delimitation Of Higher Taxacontrasting

confidence: 75%

“…3 and 4). Results by Arnal and Vucetich (2015) and Arnal et al (2014) recovered the acaremyids and †Plesiacarechimys as more closely related to †Dudumus and †Caviocricetus, while Octodontidae was interpreted as a group more recently diverged from Echimyidae (see also Vucetich and Kramarz 2003;Frailey and Campbell 2004).…”

Section: Delimitation Of Higher Taxamentioning

confidence: 93%

“…Arnal and Kramarz (2011) interpreted †Prospaniomys as an early offshoot of the Octodontidae lineage. Recent phylogenetic analyses showed that these genera, like †Caviocricetus and †Dudumus, could represent basal octodontoids not directly related to the origin of either Echimyidae or Octodontidae Arnal et al 2014;Arnal and Vucetich 2015). Alternatively, Verzi et al (2014) included †Spaniomys within Abrocomidae.…”

Section: Delimitation Of Higher Taxamentioning

confidence: 95%

“…†Caviocricetus and †Dudumus share the morphology and orientation of the mesolophule on DP4 (character state 53-1) and M1 (character state 56-1) (Verzi et al 2014: Fig. 7a;Arnal et al 2014: Fig. 4), while †Protacaremys- †BP.d enisae- †Prospaniomys- †Deseadomys are clustered by the morphology of the anterior side of metalophulid I and the protoconid area, the latter presenting an anterior concavity and a sharp labial end (character state 64-1; Fig.…”

Section: Phylogenymentioning

confidence: 98%

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Contrasting Phylogenetic and Diversity Patterns in Octodontoid Rodents and a New Definition of the Family Abrocomidae

et al. 2015

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Octodontoidea is the most species-rich clade among hystricomorph rodents. Based on a combined parsimony analysis of morphological and molecular data of extinct and extant species, we analyze the history of South American octodontoids and propose ages of divergence older than interpreted so far. Early Abrocomidae are recognized for the first time, and a new definition of the family is provided. Traditionally accepted fossil-based times of origin for the southern clades are reinterpreted as later stages of differentiation markedly uncoupled from the origin, differentiation implying specializations for open environments as shown in a morphospace of skull variation. Origin of crown groups is also strongly uncoupled from origin of clades as a consequence of extinction of deep lineages. In the resulting diversity pattern of modern southern clades of octodontoids, the combination of greater disparity, less content of evolutionary history, and lower taxonomic diversity, compared to their northern counterparts, appears at first counterintuitive. We propose that primary components of diversity derived from evolutionary transformation or anagenesis, on the one hand, and from cladogenesis and extinction, on the other, should not be considered associated, or at least not necessarily. Certain patterns of relationships between these distinct components could be driven by environmental dynamics. Like environments, octodontoid diversity would have been more stable in northern South America, whereas in the south, both strong adaptive change and extinction would have been triggered by emerging derived environments.

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Section: Delimitation Of Higher Taxacontrasting

confidence: 75%

Section: Delimitation Of Higher Taxamentioning

confidence: 93%

Section: Delimitation Of Higher Taxamentioning

confidence: 95%

Section: Phylogenymentioning

confidence: 98%

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Contrasting Phylogenetic and Diversity Patterns in Octodontoid Rodents and a New Definition of the Family Abrocomidae

et al. 2015

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“…10P-Q The early Miocene age of CTA-63 is mostly constrained by its rodent assemblage, with the octodontoid Protadelphomys sp. (Colhuehuapian SALMA; Vucetich and Bond, 2013;Arnal et al, 2014) and a relatively low-crowned dinomyid comparable to Scleromys quadrangulatus from Patagonia and Peruvian Amazonia (post-Colhuehuapian/preSantacrucian 'Pinturan' stage; Kramarz, 2006;Marivaux et al, 2012). The glyptodontid Parapropalaehoplophorus sp.…”

Section: Paleontological Contentmentioning

confidence: 99%

A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru

et al. 2016

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Late Oligocene caviomorph rodents from Contamana, Peruvian Amazonia

Boivin

Marivaux

Candela³

et al. 2016

Papers in Palaeontology

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The Deseadan South American Land Mammal Age (late Early Oligocene -Late Oligocene) attests to a time of great diversification in the caviomorph rodent fossil record. Nevertheless, Deseadan rodent-bearing localities in Neotropical lowlands are few and poorly known. Here we describe the rodent assemblages from two Late Oligocene localities, near Contamana, Loreto, Peru. Seven taxa are new to science: Palaeosteiromys amazonensis gen. et sp. nov., Plesiosteiromys newelli gen. et sp. nov., Loretomys minutus gen. et sp. nov., Scleromys praecursor sp. nov, Ucayalimys crassidens gen. et sp. nov., Chambiramys sylvaticus gen. et sp. nov. and Chambiramys shipiborum gen. et sp. nov. These rodent faunas show that caviomorphs were relatively diverse in Peruvian Amazonia during the Late Oligocene, with the co-occurrence of at least three extant superfamilies: Erethizontoidea, Octodontoidea and Chinchilloidea. Additionally, they mark the earliest known

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A new early Miocene octodontoid rodent (Hystricognathi, Caviomorpha) from Patagonia (Argentina) and a reassessment of the early evolution of Octodontoidea

Cited by 34 publications

References 25 publications

Contrasting Phylogenetic and Diversity Patterns in Octodontoid Rodents and a New Definition of the Family Abrocomidae

Contrasting Phylogenetic and Diversity Patterns in Octodontoid Rodents and a New Definition of the Family Abrocomidae

A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru

Late Oligocene caviomorph rodents from Contamana, Peruvian Amazonia

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