Pictures courtesy of Raup and Stanley (1971)
Raup, D.M. & Stanley, S.M., 1971, Principles of Paleontology, W.H. Freeman and Company, San Francisco.
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Pictures courtesy of Raup and Stanley (1971)
Raup, D.M. & Stanley, S.M., 1971, Principles of Paleontology, W.H. Freeman and Company, San Francisco. |