Author Contributions
MTRH, MCS, and JAL organized field work; MTRH and MCS conducted field work; MTRH, JAL, JEM, and LDP designed the study; JAL, JEM, and LLR provided resources for the study; MTRH and LDP did laboratory work; LDP wrote the manuscript and performed SNP analyses; MTRH performed phylogenetic analyses; MCS contributed figures; TRW, HCL, and MGC assisted in bioinformatics; MGC and JAW developed vcf2aln; all authors participated in revisions and acceptance of the final version of the manuscript.