This isolated tooth is a lower left third molar of Metridiochoerus andrewsi. The teeth of these pigs are made up of many pillars and are quite high crowned. This is an adaptation to a grass dominated diet. This tooth was found in 2009 in Area 105 on the east side of Lake Turkana.
Metridiochoerus andrewsi is a sexually dimorphic pig with large males and smaller females. The skulls of adult males of this species display well developed zygomatic knobs, the protuberances near the eye sockets. These are absent in the females.