3 Identifying localized biases in large datasets: A case study using

Large-scale multi-locus studies have become common in molecular phylogenetics, with new studies con28 tinually adding to previous datasets in an effort to fully resolve the tree of life. Total evidence analyses 29 that combine existing data with newly collected data are expected to increase the power of phylogenetic 30 analyses to resolve difficult relationships. However, they might be subject to localized biases, with one or 31 a few loci having a strong and potentially misleading influence upon the results. To examine this possi