Figure 2 (IMAGE)

Tohoku University

Figure 2

Caption

A plesiosaur with a unique morphology. Modern animals that swim using their fins propel themselves using their front fins, but plesiosaurs have very large front and hind fins, and it is thought that they could use both to propel themselves. The problem of the coordination of the limbs of plesiosaurs is discussed as the 'four-wing problem,' and it is one of the long-standing movement reconstruction issues in paleontology. 

Credit

Akira Fukuhara

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