Papilio joanae, the Ozark swallowtail, is a North American butterfly species in the family Papilionidae.Jim P. Brock and Kenn Kaufman (2003). Butterflies of North America. Houghton Mifflin, New York, NY. It was once considered a synonym of the black swallowtail (Papilio polyxenes).James A. Scott (1986). The Butterflies of North America. Stanford University Press, Stanford, CA.
Description The Ozark swallowtail is almost identical to the black swallowtail. Despite this similarity, an analysis of the Ozark swallowtail's mitochondrial DNA suggests that it is actually more closely related to the Old World swallowtail (Papilio machaon).Jeffrey Glassberg (1999). Butterflies through Binoculars: The East. Oxford University Press, New York, NY. On both surfaces of the hindwing, the pupil in the eyespot usually touches the edge of the inner margin. On the underside of the hindwing, the orange spots have very little or no yellow in them. The black adult color pattern characterizing P. polyxenes is presumed to be inherited as a simple autosomal dominant
Distribution This butterfly is endemic to the Ozark Mountains in the United States. It is uncommon to rare in this region.
Flight The Ozark swallowtail is seen from April to September.
Habitat P. joanae is found in cedar glades and woodland habitats.Thomas J. Allan, Jim P. Brock, and Jeffrey Glassberg (2005). Caterpillars in the Field and Garden. Oxford University Press, New York, NY.
Life cycle The caterpillar is morphologically very similar to the black swallowtail caterpillar. The two species may be more easily distinguished by the habitat and host plants upon which the caterpillar feeds, as these differ. There are two broods per year.
Host plants Thaspium barbinode - meadow parsnip Taenidia integerrima - yellow pimpernel Zizia aurea - golden alexander
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