Figure 6 in Evolution of the zygomasseteric construction in Rodentia, as revealed by a geometric morphometric analysis of the mandible of Graphiurus (Rodentia, Gliridae)

Figure 6. Zygomasseteric construction in extinct and extant Gliridae with the origin and insertion of the lateral (thin arrows) and medial (thick arrows) portions of the masseteric muscle. A, QP 625, Gliravus majori (Quercy, France, Oligocene), protrogomorphy; B, ITD 140 Bransatoglis micio [Itardies, Quercy, Oligocene (MP23)], derived protrogomorphy (or primitive myomorphy); C, Glis glis, myomorphy; D, Graphiurus hueti, hystricomorphy. The dotted lines are reconstructions. Abbreviations: iof, infraorbital foramen; zp, zygomatic plate. Scale bar, 5 mm.