That TAXONOMY should be phylogenetic—i.e., that named taxa should be restricted to monophyletic groups—is widely accepted throughout systematic biology. A recently proposed phylogenetic nomenclatural system (de Queiroz and Gauthier, 1990, 1992, 1994; Cantino and de Queiroz, 2000) goes further by specifying that all supraspecific taxon names be explicitly defined on the basis of common ancestry. This phylogenetic nomenclatural system would eventually replace the Linnean system currently in use. In this note, we discuss why this is a good thing for paleontology and suggest ways in which we, as a community, can make the transition from typological to...

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