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A new species of Vasseuromys (Gliridae, Mammalia) from the Upper Oligocene of the Ebro Basin (Spain)

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Abstract

In this paper, a new species of Vasseuromys, V. bergasensis sp. nov., from the locality of Bergasa (Ebro Basin, Spain), is described. Bergasa contains a fauna belonging to the Late Oligocene (zone MP30), composed—among other species—of Issiodoromys pseudanaema and Rhodanomys transiens. The main diagnostic features of V. bergasensis sp. nov. are the presence of a long centrolophid (fused or not to the mesoconid) in the lower molars, a large reduction in the number and length of extra ridges in the upper and lower molars, the absence of extra ridges between metalophid and centrolophid and between centrolophid and mesolophid, and the absence of the metatrope in more than half the specimens of the upper teeth M1 and M2. V. bergasensis sp. nov. is similar in size to V. elegans and smaller than the other members of the genus. The age and simple dental pattern of the new species of Vasseuromys allow us to hypothesize about relationships within the genus.

Kurzfassung

In dieser Arbeit wird eine neue Art von Vasseuromys, V. bergasensis sp. nov., aus der Lokalität Bergasa (Ebro Becken, Spanien) beschrieben. Bergasa enthält eine Fauna des späten Oligozän (Zone MP30) mit, unter anderen Arten Issiodoromys pseudanaema und Rhodanomys transiens. Die wichtigste diagnostische Merkmale von V. bergasensis sp. nov. sind: ein langes Centrolophid, verbunden oder nicht mit dem Mesoconid, in den unteren Backenzähnen, die starke Reduzierung der Anzahl und der Länge der zusätzlichen Rippen in den oberen und unteren Molaren, die Abwesenheit von zusätzlichen Graten zwischen metalophid und centrolophid und zwischen Centrolophid und Mesolophid und die Abwesenheit des Metatropes in mehr als die Hälfte der M1,2. Die Größe des V. bergasensis sp. nov. ist V. elegans ähnlich, und kleiner als die anderen Arten der Gattung. Das Alter und das einfache Zahnmuster der neuen Art erlauben Hypothesen auf die Beziehungen innerhalb der Gattung.

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Acknowledgments

We thank P. Gómez and E. Navarro (SCSIE, UV) for capable laboratory assistance and Research Group UCM 910607 members for their comments and criticism. We thank Dr. Jèrôme Prieto, Dr. Lars van den Hoek Ostende and Editor-in-Chief, Oliver Rauhut, for their useful comments and criticism. This investigation was financied through the projects HAR2012-32703 and GVPRE/2008/320.

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Authors and Affiliations

  1. Departament de Geologia, Universitat de València, 46100, Burjassot, Spain

    Francisco Javier Ruiz-Sánchez

  2. Conselleria d’Infraestructures, Territori i Medi Ambient, 46011, Valencia, Spain

    Jose Ignacio Lacomba-Andueza

  3. Departamento de Estratigrafía y Paleontología, Universidad de Granada, 18071, Granada, Spain

    Matthijs Freudenthal

  4. Netherlands Centre for Biodiversity, Naturalis, P.O. Box 9517, 2300 RA, Leiden, The Netherlands

    Matthijs Freudenthal

  5. Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain

    Mari Ángeles Álvarez-Sierra

  6. Departamento de Geología Sedimentaria y Cambio Medioambiental, Instituto de Geociencias, IGEO, (CSIC, UCM), C/José Antonio Novais 2, 28040, Madrid, Spain

    Mari Ángeles Álvarez-Sierra

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  1. Francisco Javier Ruiz-Sánchez
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  2. Jose Ignacio Lacomba-Andueza
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  3. Matthijs Freudenthal
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  4. Mari Ángeles Álvarez-Sierra
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Correspondence to Francisco Javier Ruiz-Sánchez.

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Ruiz-Sánchez, F.J., Lacomba-Andueza, J.I., Freudenthal, M. et al. A new species of Vasseuromys (Gliridae, Mammalia) from the Upper Oligocene of the Ebro Basin (Spain). Paläontol Z 88, 73–84 (2014). https://doi.org/10.1007/s12542-013-0177-1

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