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1 Department of Geosciences, University of Arizona, Tucson, Arizona 85721
Variation in the actual preservation of fossils can be used to detect taphonomic megabiases—large-scale distortions caused by changes in the quality of the fossil record. For example, temporal changes in the taphonomy of lingulide brachiopods suggest that Paleozoic lingulides had a higher fossilization potential than the post-Paleozoic ones. The frequency of stratigraphic occurrences of lingulides covaries with their fossilization potential. Thus, the apparent decline in the importance of lingulides in Phanerozoic communities may be due to changes in their fossilization potential. Taphonomic megabiases may be very common. We distinguish four major types of megabiases: within taxon, static among taxon, dynamic among taxon, and global.
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