A New Early Miocene Chinchilloid Hystricognath Rodent; an Approach to the Understanding of the Early Chinchillid Dental Evolution

Kramarz, Alejandro Gustavo; Vucetich, Marı́a Guiomar; Arnal, Michelle

doi:10.1007/s10914-012-9215-0

Cited by 43 publications

(92 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…BScleromys^from northern South America possibly documents another genus distinct from Scleromys from the higher latitudes of that landmass (Patterson and Wood 1982;Walton 1997). Corroborating this hypothesis, the phylogenetic analysis of Kramarz et al (2013) showed that Scleromys osbornianus Ameghino, 1894, and BScleromys^shurmanni do not form a monophyletic group, but these two taxa appear to be related to dinomyids, a result also found here (Fig. 2).…”

Section: Cf Gyriabrus Ameghino 1883supporting

confidence: 81%

“…A character shared between neoepiblemids and chinchillids observed here, is the presence of a deep dorsal portion of the masseteric fossa, forming a groove below the coronoid process (character 39). Unexpectedly, Chinchillidae did not emerge as a monophyletic group in all recovered trees, a result different from that found by Kramarz et al (2013). More characters must be included to elucidate this relation.…”

Section: Cf Gyriabrus Ameghino 1883contrasting

confidence: 56%

“…2), the neoepiblemids emerged as a monophyletic group. In sharp contrast with the original results of Kramarz et al (2013), these taxa are more closely related to the chinchillids than the dinomyids, as previously suggested Kramarz et al (2013). Numbers indicate the Bremer support (Bremer 1994) by Kraglievich (1940) and Bondesio et al (1975).…”

Section: Cf Gyriabrus Ameghino 1883mentioning

confidence: 56%

“…The affinities of neoepiblemids with Chinchilloidea in a phylogenetic context are still poorly explored. Kramarz et al (2013) presented a cladistic study of chinchilloids including Neoepiblema, which nested close to dinomyids. However, in the matrix there were missing data concerning the mandible of this taxon (Kramarz et al 2013).…”

Section: Cf Gyriabrus Ameghino 1883mentioning

confidence: 99%

“…Kramarz et al (2013) presented a cladistic study of chinchilloids including Neoepiblema, which nested close to dinomyids. However, in the matrix there were missing data concerning the mandible of this taxon (Kramarz et al 2013). As a preliminary test, now with more data available, we filled in some of the missing data for Neoepiblema, coding N. horridula, N. ambrosettianus, and Phoberomys.…”

Section: Cf Gyriabrus Ameghino 1883mentioning

confidence: 99%

See 4 more Smart Citations

Tropical Fossil Caviomorph Rodents from the Southwestern Brazilian Amazonia in the Context of the South American Faunas: Systematics, Biochronology, and Paleobiogeography

et al. 2016

View full text Add to dashboard Cite

The fossil-bearing stratigraphic sections of the Solimões Formation (southwestern Brazilian Amazonia) are exposed mainly along the Juruá, Purus, and Acre rivers, and in road cuts. These deposits have provided fossils of the four main lineages of Caviomorpha -Cavioidea, Erethizontoidea, Octodontoidea, and Chinchilloidea, contributing to the understanding on the evolution of tropical Neogene rodents. Herein, our knowledge about fossil rodents from this region is reviewed. New specimens are recorded, including taxa mentioned for this region for the first time, such as basal cavioids, Dolichotinae, Caviodon (Hydrochoeridae), and Drytomomys (Dinomyidae). Unfortunately, the deposits have no absolute ages, and based on palynological data and the biochronology of several taxa (mainly mammals), the encompassed fauna has been constrained to the late Miocene. However, some rodent lineages recorded here seem to be more related to older faunas, from the middle Miocene and Paleogene. Regarding the biogeographic and paleoenvironmental affinities, most of the Neogene rodents from the Acre region show more similarities to those from the Entre Rios, Argentina, and Urumaco, Venezuela, where wet environments were present during Neogene times. An increase in prospecting along southwestern Amazonian rivers looking for rodents (among other vertebrates) associated with methods to better constrain the ages of these faunal assemblages will contribute to a better understanding of the evolution of the tropical rodents as well as the stratigraphy and age of that portion of the basin.

show abstract

Section: Cf Gyriabrus Ameghino 1883supporting

confidence: 81%

Section: Cf Gyriabrus Ameghino 1883contrasting

confidence: 56%

Section: Cf Gyriabrus Ameghino 1883mentioning

confidence: 56%

Section: Cf Gyriabrus Ameghino 1883mentioning

confidence: 99%

Section: Cf Gyriabrus Ameghino 1883mentioning

confidence: 99%

See 3 more Smart Citations

Tropical Fossil Caviomorph Rodents from the Southwestern Brazilian Amazonia in the Context of the South American Faunas: Systematics, Biochronology, and Paleobiogeography

et al. 2016

View full text Add to dashboard Cite

show abstract

A reassessment of the cranial morphology of Neoepiblema acreensis (Rodentia: Chinchilloidea), a Miocene rodent from South America

Kerber

Ferreira

2019

Journal of Morphology

View full text Add to dashboard Cite

The rodent Neoepiblema acreensis (Chinchilloidea: Neoepiblemidae) is member of a lineage that reached gigantic dimensions during the Late Miocene of South America-the Neoepiblemidae. In this paper, the cranial anatomy of this rodent is reviewed. Noninvasive imaging is used to reveal internal structures. Our review is based mainly on an almost complete cranium from the Upper Miocene deposits of the western Amazonia of Brazil. The cranium has an elongated rostrum, large frontal sinuses, a deep temporal fossa, well-developed sagittal, nuchal, medial occipital, and secondary crests, and a tympanic fenestra connected to the external acoustic meatus by a thin ventral cleft. Remarkably, the cranium shows the presence of fossae on the posterior region of the frontal and parietal bones, and a "W-shaped" fronto-parietal suture, which are not present in other analyzed chinchilloids. This study contributes to the knowledge of the morphology of this extinct rodent as well as to the phylogenetic relationships and paleobiology of neoepiblemids.

show abstract

Late Oligocene caviomorph rodents from Contamana, Peruvian Amazonia

Boivin

Marivaux

Candela³

et al. 2016

Papers in Palaeontology

View full text Add to dashboard Cite

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

show abstract

A New Early Miocene Chinchilloid Hystricognath Rodent; an Approach to the Understanding of the Early Chinchillid Dental Evolution

Cited by 43 publications

References 16 publications

Tropical Fossil Caviomorph Rodents from the Southwestern Brazilian Amazonia in the Context of the South American Faunas: Systematics, Biochronology, and Paleobiogeography

Tropical Fossil Caviomorph Rodents from the Southwestern Brazilian Amazonia in the Context of the South American Faunas: Systematics, Biochronology, and Paleobiogeography

A reassessment of the cranial morphology of Neoepiblema acreensis (Rodentia: Chinchilloidea), a Miocene rodent from South America

Late Oligocene caviomorph rodents from Contamana, Peruvian Amazonia

Contact Info

Product

Resources

About