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| Warsaw, Benton County, Missouri male recto | Warsaw, Benton County, Missouri male verso |
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| Warsaw, Benton County, Missouri female recto | Warsaw, Benton County, Missouri female verso |
This is an interesting taxon, felt by most to be a legitimate species, more closely related to P machaon (by DNA) than to the sympatric P polyxenes ( to which it also has been ascribed.) The nearest machaon relative would be P. m. bairdi (also felt by some to be a full species.) It is very local in the pine forests of the Ozark Mtns or N Arkansas and S Missouri, and rather rare in general. Some authors continue to place it as a ssp of P machaon, to emphasize their (probable) common ancestry.