Upper Paleozoic amphibians are not good stratigraphical markers in Europe. They have yet been used by European geologists and paleontologists for several decades, in order to attempt some correlations between continental basins. The reasons of this discrepancy are both taphonomic and methodologic. Firstly, European amphibian assemblages are relatively depauperate (compared with those of the rest of the world), and are apparently useless for biostratigraphical utilizations. Incompleteness of the fossil record and incompatible abundance degrees (with those from the other worldwide assemblages) limit the precisions in the dating attempts. Secondly, numerous species have been used in biostratigraphy with questionable methods. Besides classical problems of dating and correlation of the continental formations (with the marine reference scale for instance), other limits have been highlighted: some biozones have been based on doubtful taxa, or/and without preliminary phylogenetical, taphonomical and paleoecological analysis.

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