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Unformatted text preview: or pseudoextinction and pseudoorigination . Moreover, the taxononic level under consideration will alter one's estimate of the patterns of diversity since lower taxa (species, genus) might vary in diversity more than higher taxa (family, order). Also, differences in the identification of taxa will alter estimates of patterns (see figure 20.12, pg.577). In the literature it is difficult to tell which extinction/speciation events represent real events and not "chrono" events. We can avoid this problem by tabulating higher taxa . It is unlikely that all representatives of a genus will evolve simultaneously into a new genus, but what is a genus (or a family)? is it a real unit of diversity?...
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- Fall '10