[ Back to EurekAlert! ]

Contact: Nancy Ross-Flanigan
University of Michigan


Caption: Evolutionary relationships between terrestrial even-toed hoofed mammals (artiodactyls), Eocene archaeocete whales, and modern toothed and baleen whales. The skulls of archaeocetes and toothed whales are asymmetrical, but the skulls of artiodactyls and baleen whales are symmetrical. Asymmetry evolved in archaeocetes and was later exaggerated in toothed whales. Asymmetry was reduced in baleen whales.

Credit: Credit: Julia M. Fahlke

Usage Restrictions: None

Related news release: Ancient whale skulls and directional hearing: A twisted tale

[ Back to EurekAlert! ]