Figure 12 in A revision of Aceratherium blanfordi Lydekker, 1884 (Mammalia: Rhinocerotidae) from the Early Miocene of Pakistan: postcranials as a key

Figure 12. Morphological comparison amongst left astragali of four coeval fossil rhinocerotids (Early Miocene) referred to the genera Pleuroceros Roger, 1898 and Mesaceratherium Heissig, 1969, in lateral view. A, Pleuroceros blanfordi (Lydekker, 1884), Zinda Pir Dome, Pakistan; B, Pleuroceros pleuroceros (Duvernoy, 1853), Aquitaine Basin, France (reversed). 1. medial lip smaller than the lateral one; 2. lateral height much exceeding medial height; 3. robust, broad, and low bone; 4. deep trochlear notch; 5. broad and oblique fibula-facet; 6.high collum tali (with respect to total height); 7. medial tubercle low, salient, and laterally displaced.; C, Mesaceratherium welcommi sp. nov., Bugti Hills, Pakistan; D, Mesaceratherium paulhiacense (Richard, 1937), Aquitaine Basin, France. 1. medial lip nearly equals the lateral one in size; 2. lateral height nearly equals medial height; 3. slender, narrow, and elevated bone; 4. narrow trochlear notch; 5. narrower and less oblique fibula-facet; 6.high collum tali (but lower with respect to total height); 7. medial tubercle high, smooth, and not-laterally displaced. (B) and (D) modified after de Bonis (1973). Scale bar = 2 cm.