» Skull > 250mm (9 3/4 in) long; canines may be present… Perissodactyla (horse)
» Skull < 150mm (6 in) long; incisors very large; no canines present
» Skull > 250mm (9 3/4 in) long; canines may be present… Perissodactyla (horse)
» Skull < 150mm (6 in) long; incisors very large; no canines present