Data from: Genomic integrity of Phyciodes butterfly species in a region of contact (Lepidoptera: Nymphalidae)

<p>Crescent butterflies of the <em>Phyciodes tharos </em>group have a long-standing reputation for taxonomic difficulty.<em> </em>We assessed species boundaries in the <em>P. tharos </em>group using genome-wide SNP data, focusing on sampling in western Canada where four species (<em>P. tharos</em>, <em>P. cocyta</em>, <em>P. pulchella,</em> and <em>P. batesii</em>) have classically been recognized. Phylogenetic and cluster-based analyses confirm that there are indeed four species based on the maintenance of genomic integrity in the presence of occasional hybridization and low levels of gene flow. Mitochondrial COI does not consistently distinguish species, with haplotypes extensively shared between species. Here, we provide data matrices and tree files from the phylogenetic and cluster-based analyses.</p>