The Baronninae and the extinct subfamily Praepapilioninae share many external similarities and are traditionally considered to be the most primitive subfamilies and sister to the rest of the swallowtails.
Os Baronninae e a subfamilia extinta Praepapilioninae teñen moitas semellanzas externas e son consideradas tradicionalmente as subfamilias máis primitivas e irmás do resto dos papilionidos.