Summary of parental similarity and distinctiveness of four putative hybrid lineages with morphological, genetic, and ecological data.

<p>Colored boxes denote similarity or clustering with parental species, or distinctness of the hybrid lineage. Morphology is based on clustering in morphological analysis (MCA). mtDNA is based on mitochondrial DNA clades (note that the unique hybrid clade is identified as both distinct and as <i>P</i>. <i>machaon</i>-like). MSATs STR is based on summarized ancestry at the finest subpopulation scale in STRUCTURE analyses, and MSATs DAPC on summarized clustering in DAPC analyses. Range shows sympatry or parapatry with parental species, flight period shows overlapping adult flight period, habitat is based on a general assessment of shared habitat type (forest openings, strict hilltopping behavior, under forest cover, etc.), and host plant shows shared larval host. Boxes with wide outlines indicate uncertainty in particular characteristics. Ecological information is presented in more detail in Table D in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141882#pone.0141882.s001" target="_blank">S1 File</a>.