In:
PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 11 ( 2021-11-3), p. e0258455-
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0258455
DOI:
10.1371/journal.pone.0258455.g001
DOI:
10.1371/journal.pone.0258455.g002
DOI:
10.1371/journal.pone.0258455.g003
DOI:
10.1371/journal.pone.0258455.g004
DOI:
10.1371/journal.pone.0258455.g005
DOI:
10.1371/journal.pone.0258455.g006
DOI:
10.1371/journal.pone.0258455.g007
DOI:
10.1371/journal.pone.0258455.g008
DOI:
10.1371/journal.pone.0258455.g009
DOI:
10.1371/journal.pone.0258455.g010
DOI:
10.1371/journal.pone.0258455.g011
DOI:
10.1371/journal.pone.0258455.g012
DOI:
10.1371/journal.pone.0258455.t001
DOI:
10.1371/journal.pone.0258455.t002
DOI:
10.1371/journal.pone.0258455.s001
DOI:
10.1371/journal.pone.0258455.s002
DOI:
10.1371/journal.pone.0258455.s003
DOI:
10.1371/journal.pone.0258455.s004
DOI:
10.1371/journal.pone.0258455.s005
DOI:
10.1371/journal.pone.0258455.s006
DOI:
10.1371/journal.pone.0258455.s007
DOI:
10.1371/journal.pone.0258455.r001
DOI:
10.1371/journal.pone.0258455.r002
DOI:
10.1371/journal.pone.0258455.r003
DOI:
10.1371/journal.pone.0258455.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2021
detail.hit.zdb_id:
2267670-3
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