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Digital Guide to Moth Identification

Pieridae 77a0468 – 4194   Pontia occidentalis (Reakirt, 1866)

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Larva and Host Plants: Host familiy: Brassicaceae Cleomaceae[Capparaceae].  Host genera: Anelsonia Arabis[unresolved] Athysanus Barbarea Boechera[=Arabis] Brassica Caulanthus[=Guillenia] Ch...  Host extended: wide variety of mustards (Allen et al 2005); Thlaspi arvense-oviposition records-NOT a host plant (S...  (Kimberley & Douglas 2025) Similar Species: Pinned specimens of related species. (Hint: select View by Region on the related species page.) Synonymy: occidentalis (Reakirt, 1866) (Pieris) - MONA 1983: 4194 callidice of authors; (not Hübner, [1800]) (Papilio) misappl. ssp. a. occidentalis (Reakirt, 1866) (Pieris)  calyce (Edwards, 1870) (Pieris) ssp. b. nelsoni (Edwards, 1883) (Pieris)  boreoasiatica Kosterin & Gorbunov, 2007 (Pontia)

References (Caution: DNA barcoding at BOLD provides evidence of relatedness, not proof of identification; some BOLD specimens shown may not be sequenced.)

Barcode of Life (BOLD) - Caution: Identifications often erroneous; DNA barcode provides evidence of relatedness, not proof of identification; many specimens not sequenced. Shropshire, K.J. & D.W. Tallamy, 2025. Lepidoptera of North America, north of Mexico: an annotated list containing geographic ranges and host-plant records. ZooKeys, 1261: 101-113; Suppl. 1. (PDF or read online) Species Page at BugGuide.Net Species Page at iNaturalist Species Page at the Butterflies of America

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