2026-08-20T06:04:22Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/336082024-07-16T14:00:18Zcom_20.500.14352_14col_20.500.14352_15

Ruiz Sánchez, Francisco Javier Lacomba Andueza, José Ignacio Freudenthal, Matthijs Álvarez Sierra, María De Los Ángeles 2023-06-19T13:24:57Z 2023-06-19T13:24:57Z 2014 0031-0220 DOI 10.1007/s12542-013-0177-1 https://hdl.handle.net/20.500.14352/33608 http://link.springer.com/journal/12542 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 thenumber 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. eng open access A new species of Vasseuromys (Gliridae, Mammalia) from the Upper Oligocene of the Ebro Basin (Spain) journal article