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New toxodontid (Notoungulata) from the Early Miocene of Mendoza, Argentina

Authors :: Forasiepi, Analía M
Cerdeño, Esperanza
Bond, Mariano
Schmidt, Gabriela I
Naipauer, Maximiliano
Straehl, Fiona R
Martinelli, Agustín G
Garrido, Alberto C
Schmitz, Mark D
Crowley, James L
Forasiepi, Analía M
Cerdeño, Esperanza
Bond, Mariano
Schmidt, Gabriela I
Naipauer, Maximiliano
Straehl, Fiona R
Martinelli, Agustín G
Garrido, Alberto C
Schmitz, Mark D
Crowley, James L
Source :: Forasiepi, Analía M; Cerdeño, Esperanza; Bond, Mariano; Schmidt, Gabriela I; Naipauer, Maximiliano; Straehl, Fiona R; Martinelli, Agustín G; Garrido, Alberto C; Schmitz, Mark D; Crowley, James L (2015). New toxodontid (Notoungulata) from the Early Miocene of Mendoza, Argentina. PalZ Paläontologische Zeitschrift, 89(3):611-634.
Publication Year :: 2015
Abstract: We describe a new toxodontid species, Nesodon taweretus sp. nov., from the Aisol Formation in Mendoza Province, central-west Argentina. Nesodon is a frequently found Toxodontidae, member of the Notoungulata, an extinct endemic group of Cenozoic South American mammals that are ecologically similar to current hoofed ungulates. The holotype of N. taweretus sp. nov. is a skull, and we tentatively assign some mandibular fragments and postcranial bones. N. taweretus sp. nov. differs from the other Nesodon species in several cranial and dental features, and close comparisons were made with the Patagonian Nesodon imbricatus, common in the Santa Cruz Formation (Santacrucian Age, Early Miocene). The material is of a similar size to N. imbricatus, with a body mass estimation of about 550 kg. The phylogenetic analysis groups N. taweretus sp. nov. with other species of Nesodon. The absolute age of the Aisol Formation has been established at ca 19.480 ± 0.025 Ma (Burdigalian; Early Miocene) by means of U–Pb zircon dating. The vertebrate association is encompassed by the Santacrucian Age. Latitudinal separation between Mendoza and Patagonia in the south would have favored taxonomic differences, as reflected in the species of Nesodon. = Wir beschreiben eine neue Art der Toxodontiden, Nesodon taweretus sp. nov., aus der Aisol-Formation in der Provinz Mendoza, im Zentralwesten von Argentinien. Nesodon ist ein häufig vorkommendes Taxon der Toxodontidae, die zu den Notoungulaten, einer ausgestorbenen Gruppe von endemischen Säugetieren des Känozoikums in Südamerika, gehören und den rezenten gehuften Ungulata ökologisch ähnlich waren. Der Holotyp von N. taweretus sp. nov. ist ein Schädel, dem wir vorläufig einige Unterkieferfragmente und postkraniale Knochen zuweisen. N. taweretus sp. nov. unterscheidet sich von den anderen Nesodon-Arten in mehreren Merkmalen des Schädels und der Bezahnung. Enge Vergleiche wurden mit dem aus Patagonien stammenden und in der Santa-Cruz-Formation (Santacru

Details

Database :: OAIster
Journal :: Forasiepi, Analía M; Cerdeño, Esperanza; Bond, Mariano; Schmidt, Gabriela I; Naipauer, Maximiliano; Straehl, Fiona R; Martinelli, Agustín G; Garrido, Alberto C; Schmitz, Mark D; Crowley, James L (2015). New toxodontid (Notoungulata) from the Early Miocene of Mendoza, Argentina. PalZ Paläontologische Zeitschrift, 89(3):611-634.
Notes :: application/pdf, info:doi/10.5167/uzh-207625, English, English
Publication Type :: Electronic Resource
Accession number :: edsoai.on1443040016
Document Type :: Electronic Resource