Figure 4. 1. Ventral view of the maxilla of Gobiolagus tolmachovi (AMNH 141277) from the late middle Eocene Shara Murun Formation, Ula Usu, Shara Murun Region of Inner Mongolia; 2. Ventral view of AMNH 141295 showing the root condition of p4-m2 of G. tolmachovi. Images taken from gray-toned casts.