Figure 2.20. Conventional cladistic versus stratocladistic analyses. Left: Cladogram derived from fossil occurrences below, showing minimization of homoplasy. Right: Cladogram derived from minimizing ad hoc preservation hypotheses but requiring instances of character reversal. Filled boxes represent putative ancestors. (After Fox, Fisher, and Leighton 1999, with permission from the American Association for the Advancement of Science.)

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