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This extract is taken from S365 produced by the BBC on behalf of the Open University © 2002 The Open University
The following material appears in Evolution: A Biological and Palaeontological Approach, (Peter Skelton, editor), published by Pearson Prentice Hall in association with The Open University. This book forms part of The Open University course S365 Evolution. © The Open University 1993.
Chapter 11 (11.2) Evolutionary relationships and history, pages 516–521
Figure 13 Display: Janet Haresnape; Photograph: Peter Skelton
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