Species inflation and taxonomic artefacts—A critical comment on recent trends in mammalian classification

"Recently, many new (extant) mammal species have been named, mostly by raising subspecies to species. rank. This is primarily a consequence of the phylogenetic species concept (PSC) that has become very. popular over the last few decades. We highlight several cases of splitting and argue that much of. this taxonomic inflation is artificial due to shortcomings of the PSC and unjustified reliance on insufficient. morphological and\/or genetic data. We particularly discourage species splitting based on gene. trees inferred from mitochondrial DNA only and phenetic analyses aimed at diagnosability. Uncritical. acceptance of new species creates an unnecessary burden on the conservation of biodiversity."