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Digital Guide to Moth Identification

Geometridae 91a1079 – 6661   Phigalia plumogeraria (Hulst, 1888)              Walnut Spanworm

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Larva and Host Plants: Host familiy: Ericaceae Fagaceae Juglandaceae Rhamnaceae Rosaceae Salicaceae Sapindaceae.  Host genera: Acer Arbutus Ceanothus Juglans Malus Prunus Purshia Quercus Salix.  (Shropshire & Douglas 2025) Similar Species: Pinned specimens of related species. (Hint: select View by Region on the related species page.) Synonymy: plumogeraria (Hulst, 1888) (Boarmia) - MONA 1983: 6661 immacularia (Cassino & Swett, 1922) (Coniodes) plumigeraria (Hulst, 1888) (Boarmia) emend.; TL: (no type).

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. Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 28.33m; p. 211. Book Review and ordering 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

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