Figure 3.12   Paleontological knowledge has improved by about 5% in the 26-year period between 1967 and 1993. According to 1993 data there is 5% less gap, as assessed by a relative completeness index (RCI), implied in the fossil record of tetrapods than in 1967. This fi gure was obtained by comparing the order of branching points in cladograms with the order of appearance of fossils in the rocks. Will there be a further 5% shift to the right (i.e. towards 100% completeness) by the year 2019? (Based on Benton & Storrs 1994.)

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