“…Researchers have studied the morphology and craniometrics of red foxes and, to a lesser extent, corsac foxes in other parts of their ranges (Ognev, 1962;Sokolov & Orlov, 1980;Churcher, 1960;Huson & Page, 1979;Lups & Wandeler, 1983;Fairly & Bruton, 1984;Hell et al, 1989;Ansorge, 1994;Lynch, 1996), but few published details exist on the cranial measurements of these species in Mongolia. Previous work found that corsac foxes demonstrated a smaller total skull length than do red foxes, whose skulls range from 140-150 mm (Lariviere & Pasitschniak-Arts, 1996, Clark et al, 2009). In addition, corsac foxes have a less-developed and lower sagittal crest, a more gradually tapering rostrum, and smaller, fl atter auditory bullae than do red foxes (Sokolov & Orlov, 1980;Sheldon, 1992;Clark et al, 2009).…”