New caviomorph rodents from the late Oligocene of Salla, Bolivia: taxonomic, chronological, and biogeographic implications for the Deseadan faunas of South America

Pérez, María Encarnación; Arnal, Michelle; Boivin, Myriam; Vucetich, Marı́a Guiomar; Candela, Adriana Magdalena; Busker, Felipe; Quispe, Bernardino Mamaní

doi:10.1080/14772019.2018.1471622

Cited by 21 publications

(35 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…MNHN 1903-3-18 is tetralophodont and non-taeniodont as p4s and dp4s from La Venta, but has lingual flexids much more extended. The material from La Venta differs from Eopululo , Protosteiromys , Branisamyopsis , Hypsosteiromys , Parasteiromys , Eosteiromys , Steiromys and Neosteiromys [ 73 – 76 , 78 – 82 ] in having a smaller size; from Hypsosteiromys in having brachydont lower teeth with transverse lophids and a complete metalophulid I; from E . annectens and S .…”

Section: Systematic Paleontologymentioning

confidence: 90%

Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia

et al. 2021

Self Cite

View full text Add to dashboard Cite

Miocene deposits of South America have yielded several species-rich assemblages of caviomorph rodents. They are mostly situated at high and mid- latitudes of the continent, except for the exceptional Honda Group of La Venta, Colombia, the faunal composition of which allowed to describe the late middle Miocene Laventan South American Land Mammal Age (SALMA). In this paper, we describe a new caviomorph assemblage from TAR-31 locality, recently discovered near Tarapoto in Peruvian Amazonia (San Martín Department). Based on mammalian biostratigraphy, this single-phased locality is unambiguously considered to fall within the Laventan SALMA. TAR-31 yielded rodent species found in La Venta, such as the octodontoid Ricardomys longidens Walton, 1990 (nom. nud.), the chinchilloids Microscleromys paradoxalis Walton, 1990 (nom. nud.) and M. cribriphilus Walton, 1990 (nom. nud.), or closely-related taxa. Given these strong taxonomic affinities, we further seize the opportunity to review the rodent dental material from La Venta described in the Ph.D. volume of Walton in 1990 but referred to as nomina nuda. Here we validate the recognition of these former taxa and provide their formal description. TAR-31 documents nine distinct rodent species documenting the four extant superfamilies of Caviomorpha, including a new erethizontoid: Nuyuyomys chinqaska gen. et sp. nov. These fossils document the most diverse caviomorph fauna for the middle Miocene interval of Peruvian Amazonia to date. This rodent discovery from Peru extends the geographical ranges of Ricardomys longidens, Microscleromys paradoxalis, and M. cribriphilus, 1,100 km to the south. Only one postcranial element of rodent was unearthed in TAR-31 (astragalus). This tiny tarsal bone most likely documents one of the two species of Microscleromys and its morphology indicates terrestrial generalist adaptations for this minute chinchilloid.

show abstract

Section: Systematic Paleontologymentioning

confidence: 90%

Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…If present, this premolar and its alveolus could disappear in adult specimens, as is usual in other caviomorphs (Pérez et al . ). On the dorsal aspect of the maxillary fragment, there is no rim or furrow for the passage for the infraorbitalis nerve.…”

Section: Systematic Palaeontologymentioning

confidence: 97%

New Palaeogene caviomorphs (Rodentia, Hystricognathi) from Santa Rosa, Peru: systematics, biochronology, biogeography and early evolutionary trends

Arnal

Kramarz

Vucetich

et al. 2019

Papers in Palaeontology

Self Cite

View full text Add to dashboard Cite

show abstract

“…We employed most of the dental characters and character states listed by Marivaux in Antoine et al (2012). However, some characters were re-interpreted or added in order to better describe the extent and variation of the character states within the Palaeogene Ctenohystrica Marivaux et al, 2004aMarivaux et al, , 2014aMarivaux et al, , 2017aBoivin et al, 2017aBoivin et al, ,b, 2019. As in Antoine et al (2012), some multistate characters were considered as ordered if changes from one state to another required passing through intermediate states (Slowinski, 1993).…”

Section: Selected Charactersmentioning

confidence: 99%

“…If the retention of the deciduous premolars characterizes crown Phiomorpha (but not all stem members of the clade) but also the extinct metaphiomyines (species of Metaphiomys) and some members of the phiocricetomyines (Mubhammys and Birkamys), accordingly this dental feature was achieved independently several times among African stem and crown hystricognaths. The iterative pattern of this dental feature is emphasized even more by the fact that several extinct and extant representatives of crown caviomorphs (octodontoids) also have suppressed the eruption of permanent lower and upper premolars, whereas a replacement of the deciduous premolars is observed in most stem caviomorphs for which these dental loci are documented (e.g., Frailey & Campbell, 2004;Vucetich et al, 2010;Antoine et al, 2012;Boivin et al, 2017aBoivin et al, , 2019Pérez et al, 2019; except for Eobranisamys romeropittmanae, see Frailey & Campbell, 2004).…”

Section: Cladistic Analyses: Systematic and Macroevolutionary Implicamentioning

confidence: 99%

Emergence of hystricognathous rodents: Palaeogene fossil record, phylogeny, dental evolution and historical biogeography

Marivaux

Boivin

2019

Zoological Journal of the Linnean Society

Self Cite

View full text Add to dashboard Cite

Although phylogenetic trees imply Asia as the ancestral homeland of the Hystricognathi clade (Rodentia: Ctenohystrica), curiously the oldest known fossil occurrences of hystricognathous rodents are not from Asia, but from Africa and South America, where they appear suddenly in the fossil record of both landmasses by the Late Middle Eocene. Here we performed cladistic and Bayesian (standard and tip-dating analyses) assessments of the dental evidence documenting early ctenohystricans, including several Asian ‘ctenodactyloids’, virtually all Palaeogene Asian and African hystricognaths known thus far and two representatives of the earliest known South American hystricognaths. Our results provide a phylogenetic context of early hystricognaths (with implications on systematics) and suggest that some Eocene Asian ‘ctenodactyloids’ could be considered as stem hystricognaths and pre-hystricognaths, although they were not recognized as such originally. However, this view does not fill the gap of the Eocene Asian hystricognath record, as the proposed results imply many ghost lineages extending back to the Middle Eocene for several Asian and African taxa. They also imply a complex early historical biogeography of the group, involving multiple dispersal events from Asia to Africa (and possibly from Africa back to Asia) and then to South America sometime during the Middle Eocene. Based on these phylogenetic considerations, we discuss the emergence of hystricognathous rodents from a morpho-anatomical perspective by analysing the differentiation of their masticatory apparatus and chewing movements, notably through the evolution of their dental patterns.

show abstract

New caviomorph rodents from the late Oligocene of Salla, Bolivia: taxonomic, chronological, and biogeographic implications for the Deseadan faunas of South America

Cited by 21 publications

References 45 publications

Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia

Late middle Miocene caviomorph rodents from Tarapoto, Peruvian Amazonia

New Palaeogene caviomorphs (Rodentia, Hystricognathi) from Santa Rosa, Peru: systematics, biochronology, biogeography and early evolutionary trends

Emergence of hystricognathous rodents: Palaeogene fossil record, phylogeny, dental evolution and historical biogeography

Contact Info

Product

Resources

About