FIGURE 1. 1, Location of the Denizli Basin in western Turkey (modified from Bozkurt, 2003); 2, Geological map of the Denizli Basin modified from Erten et al. (2014) with the position of Gökpınar locality.

figure1 

FIGURE 2. Dental terminology of murid upper and lower molars (after Lazzari et. al., 2010).

figure2 

FIGURE 3. Occlusal views of Extrarius orhuni nov. gen. and sp from Gökpınar (GOP). 1, left M1 (GOP-5001); 2, right M1 (GOP-5002); 3, right M1 (GOP-5003); 4, left M2 (GOP-5004); 5, left M2 (GOP-5005); 6, left m1 (GOP-5006); 7, right m2 (GOP-5007); 8, right m2 (GOP-5008).

figure3 

FIGURE 4. Comparison of the species that have neoenterostyle in upper first molars. 1, Gökpınar locality (GOP-5001); 2, Orientalomys cf. similis from Pliocene aged Ertemte in Inner Mongolia, China (Storch 1987, plate 3); 3, Leilaomys zhidingi from Late Miocene aged Yunnan Province, China (Storch and Ni 2002, figure 2.6); 4, Progonomys clauzoni from Late Miocene, eastern France (Lazzari et. al., 2010, figure 1.1). The length of teeth has been made the same in order to facilitate morphological comparison and to draw attention to differences in shape.

figure4