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Journal of Mammalian Evolution

, Volume 24, Issue 3, pp 275–288 | Cite as

A New Eocene Dasypodid with Caniniforms (Mammalia, Xenarthra, Cingulata) from Northwest Argentina

  • Claudia M. R. Herrera
  • Jaime E. Powell
  • Graciela I. Esteban
  • Cecilia del Papa
Original Paper

Abstract

The aim of this work is to present a new genus and species of Dasypodidae from the Lumbrera Formation (“lower Lumbrera”), early-middle Eocene of Salta Province, northwest Argentina. The new taxon, documented by one specimen, consists of an incomplete skull and jaw with teeth housed in their alveoli, postcranial remains, and isolated osteoderms. Lumbreratherium oblitum, gen. et sp. nov., is characterized by heterodont dentition, with a caniniform as the first tooth, diastema between caniniform and first molariform, teeth with closed roots, and a peculiar morphology of the osteoderms. A phylogenetic analysis indicates that Lumbreratherium oblitum, gen. et sp. nov., and Pucatherium parvum belong to a monophyletic clade in a basal position within the Cingulata. The singularity of the morphological characteristics of these Paleogene armadillos of northwest Argentina reinforces the hypothesis of an intertropical origin of mammal clades different from those of the Paleogene in more austral regions of Argentina.

Keywords

New Dasypodidae Early-middle Eocene Lumbrera Formation Northwest Argentina 

Notes

Acknowledgments

We thank A. Kramarz and D. Flores (Museo Argentino de Ciencias Naturales “B. Rivadavia”), M. Reguero (Museo de La Plata), and M. Díaz (Colección Mamíferos Lillo) for providing us access to the collections under their care. Financial support was provided by Consejo de Investigaciones de la Universidad Nacional de Tucumán (CIUNT 26/G522, 26/G513), Consejo Nacional de Investigaciones Científicas y Tecnologícas (CONICET PIP -489), and Agencia Nacional de Promoción Científica y Tecnológica (FONCYT PICT-407). We are very grateful to Fernando Abdala for his comments, which greatly improved the manuscript. We thank E. Guanuco and A. Gutierrez for illustrations, M. Vince for preparation of the material, Sofia Nanni for the transalation of the manuscript. We would like to thank the reviewers, for their insightful comments on the paper, as these comments led us to an improvement of the work. The authors also thank the Facultad de Ciencias Naturales e Instituto Miguel Lillo and the Fundacion Miguel Lillo for research and facilities support.

Supplementary material

10914_2016_9345_MOESM1_ESM.doc (62 kb)
Appendix 1 Specimens examined for comparative study and cladistic analysis (DOC 62 kb)
10914_2016_9345_MOESM2_ESM.doc (82 kb)
Appendix 2 List of characters used in the cladistic analysis. Characters marked with an asterisk (*) are multistate. Characters marked with a double asterisk (**) are additive (DOC 82 kb)
10914_2016_9345_MOESM3_ESM.doc (60 kb)
Appendix 3 Data matrix used in the cladistic analysis. (?), missing data; (−), not applicable (DOC 60 kb)

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Claudia M. R. Herrera
    • 1
    • 2
  • Jaime E. Powell
  • Graciela I. Esteban
    • 1
  • Cecilia del Papa
    • 2
    • 3
  1. 1.Instituto Superior de Correlación Geológica (INSUGEO), Facultad de Ciencias Naturales e Instituto Miguel LilloUniversidad Nacional de TucumánSan Miguel de TucumánArgentina
  2. 2.Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Buenos AiresArgentina
  3. 3.CICTERRA, Facultad de Ciencias Exactas, Físicas y NaturalesUniversidad Nacional de CórdobaCórdobaArgentina

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