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Digital Guide to Moth Identification

Geometridae 91a1243 – 6756   Pero giganteus Grossbeck, 1910

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Larva and Host Plants: Host familiy: Betulaceae Grossulariaceae Pinaceae Rosaceae.  Host genera: Alnus Holodiscus Pseudotsuga Ribes.  (Kimberley & Douglas 2025) Description/ Field Marks: Sexually dimorphic: pruplish-gray Genitalia: See Poole (1987). Similar Species: Pinned specimens of related species. (Hint: select View by Region on the related species page.) Synonymy: giganteus Grossbeck, 1910 (Pero) - MONA 1983: 6756; TL: Provo, UT. (Based on locality of male genitalia, pl. 15, fig. 3 in the original description; see Poole (1987)). provoensis Cassino & Swett, 1922 (Pero); TL: Deer Creek, Provo Canyon, UT

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. Grossbeck, J.A., 1910. Studies on the North American geometrid moths of the genus Pero. Proceedings of the United States National Museum, 38: 366; 13, fig.3; pl. 15, fig. 3. Poole, R.W., 1987. A Taxonomic Revision of the New World Moth Genus Pero (Lepidoptera: Geometridae). United States Department of Agriculture, Technical Bulletin 1698: 70; figs. 221, 222, 622, 622a, 655, 1014.. Rindge, F.H., 1955. A revision of some species of Pero in the western United States (Lepidoptera: Geometridae). American Museum Novitates, 1750: 4. 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 iNaturalist

type (giganteus) - LG – © AMNH 42mm – © Jim Vargo 45mm - LG – © Jim Vargo 45mm - LG – © Jim Vargo

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