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A new species of Vasseuromys (Gliridae,Mammalia) from the Upper Oligocene of the Ebro Basin (Spain) |
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| Authors: | Francisco Javier Ruiz-Sánchez Jose Ignacio Lacomba-Andueza Matthijs Freudenthal Mari Ángeles Álvarez-Sierra |
| Institution: | 1. Departament de Geologia, Universitat de València, 46100, Burjassot, Spain 2. Conselleria d’Infraestructures, Territori i Medi Ambient, 46011, Valencia, Spain 3. Departamento de Estratigrafía y Paleontología, Universidad de Granada, 18071, Granada, Spain 4. Netherlands Centre for Biodiversity, Naturalis, P.O. Box 9517, 2300 RA, Leiden, The Netherlands 5. Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain 6. Departamento de Geología Sedimentaria y Cambio Medioambiental, Instituto de Geociencias, IGEO, (CSIC, UCM), C/José Antonio Novais 2, 28040, Madrid, Spain |
| 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. |
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