Skip to main content


Fig. 19 | Evolution: Education and Outreach

Fig. 19

From: From Land to Water: the Origin of Whales, Dolphins, and Porpoises

Fig. 19

a Outline ellipses and regression of body size (on x-axis, as 10-log in grams) against semicircular canal radius (on y-axis, as 10-log in mm) for modern land mammals (maroon) and modern cetaceans (blue). Fossil cetaceans are the pakicetid Ichthyolestes (red), the remingtonocetid Remingtonocetus (orange), the protocetid Indocetus (yellow), and the basilosaurid Dorudon (purple). Modified from Spoor et al. (2002). b A reconstruction of inner ear of modern bowhead whale, showing semicircular canals above, broken stapes (yellow), and the cochlea below

Back to article page