Fig. 13From: From Land to Water: the Origin of Whales, Dolphins, and PorpoisesThe teeth of Indohyus (left) are different from the teeth of pakicetids (right) in that Indohyus has upper molar teeth with four cusps. Pakicetid upper molars have three cusps. The wear facets (indicated by patterns of reflected light) may indicate that pakicetids were eating fishBack to article page