Gliridae (Rodentia, Mammalia) with a simple dental pattern: a new genus and new species from the European Early and Middle Miocene Author García-Paredes, Israel Author Peláez-Campomanes, Pablo Author Álvarez-Sierra, M. Ángeles text Zoological Journal of the Linnean Society 2009 2009-10-26 157 3 622 652 https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2009.00527.x journal article 10.1111/j.1096-3642.2009.00527.x 0024-4082 5443075 PSEUDODRYOMYS DE BRUIJN, 1966 Type species: Pseudodryomys ibericus De Bruijn, 1966 ( Fig. 9 ). Original diagnosis ( De Bruijn, 1966: 7 ): ‘ Gliridae of intermediate size. Occlusal surface of cheek teeth concave. Crowns of cheek teeth low. P4/p4 small relative to M1/m1 and rounded; M1/m1 smaller than M2/m2. The Spanish representatives of the genus Pseudodryomys are characterized by a gradual simplification of the dental pattern through time’. Emended diagnosis: Medium to large-sized Gliridae , which have cheek teeth with a concave occlusal surface. The dental pattern is formed by the four main ridges and a variable number of extra ridges, usually between two and eight, including centrolophs and centrolophids. The ridges are relatively high, thick, and slanting and the valleys are narrow. In P4, M1, and M2 the trigon is very asymmetric forming a composite Y-shape. The upper molars generally have both centrolophs, the anterior one usually being longer. The lingual parts of the centrolophs may be joined to each other and/or also to the metaloph. The P4 has an oval outline; it is not very simplified and may present one or even two short centrolophs. Lower molars have a relatively long centrolophid and in m1 and m2 there is at least one extra ridge in the posterior valley. The mesolophid of the m3 is not reduced and labially is not connected to the posterolophid. Stratigraphical distribution: Local zones X to E ( MN 1, Lower Miocene – MN 5, Middle Miocene). Geographical distribution: Central and south-western Europe. Species included Pseudodryomys ibericus De Bruijn, 1966 Pseudodryomys rex (García Moreno, 1986 in Álvarez Sierra & García-Moreno, 1986) Pseudodryomys granatensis Agustí, 1993 in Martín- Suárez et al. , 1993