A Photographic Guide To The Differences Between The Common Warthog And The Desert Warthog.
Detail of mandible: Top: Ph. aethiopicus (BM 50.8.24.25); Bottom: Ph. africanus (BM 36.3.30.12). Note: Ph. africanus has usually 3 pairs of lower incisors; in Ph. aethiopicus lower incisors are absent, or vestigial and non-functional.
