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→Problems
* Inconsistent taxonomic identifications by practitioners, impairing the validity of the basic data
* Inconsistent taxonomic identifications by practitioners, impairing the validity of the basic data
* Difficulty in distinguishing local differences in the composition of fossil communities from those produced by geographic separation
* Difficulty in distinguishing local differences in the composition of fossil communities from those produced by geographic separation
* Development of accreted terranes, which may tectonically juxtapose contrasting biogeographic entities that were not naturally contiguous
* Development of accreted [[Wikipedia:Terrane|terranes]], which may tectonically juxtapose contrasting biogeographic entities that were not naturally contiguous
==See also==
==See also==