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Species Phigalia denticulata - Toothed Phigalia - Hodges#6659

Small Phigalia - Hodges#6660 - Phigalia denticulata Unknown Moth - Phigalia denticulata - male Winter Moth - Phigalia denticulata - male Unknown Caterpillar - Phigalia denticulata caterpillar - Phigalia denticulata I believe this is a specimen of Phigalia denticulata? - Phigalia denticulata - male Light gray moth with wavy black lines - Phigalia denticulata - male Phigalia? - Phigalia denticulata - male
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Subfamily Ennominae
Tribe Bistonini
Genus Phigalia
Species denticulata (Toothed Phigalia - Hodges#6659)
Hodges Number
Synonyms and other taxonomic changes
Phigalia denticulata Hulst, 1900
Phylogenetic sequence # 196675
Wingspan: (1)
♂ 30-37 mm.
♀ 2 mm. (vestigial wings).
Adult male: forewing mottled gray with thin black wavy lines; PM line sharply-toothed near costa, bulging inward above inner margin where it usually approaches median line
Hindwing light gray with toothed median line and diffuse speckling; female has vestigial wings and cannot fly.
Texas to Florida(2) and north to Iowa and Massachusetts.(3), (2)
Ontario. (3)
Moth Photographers Group - large map with some distribution data.
Wooded areas; adult males attracted to light.
Most records are from January to May and October to December. (3)
Larval host unknown but probably leaves of hardwood trees. (2)
Often confused with Phigalia strigataria; Can be separated by the following:

In denticulata, a very distinct dark “tooth” is located on the M1 vein where it comes off of the discal cell. This is seen as the “3rd tooth” from the costa, evenly spaced along the PM line of denticulata. In strigataria, this marking is either absent (giving the appearance of a gap between two pairs of “teeth”) or greatly reduced (only being about a third the length of the larger tooth beside it), even sometimes appearing as simply a diffuse black spot. See following image for visual.
See Also
Small Phigalia (Phigalia strigataria) has a less-mottled forewing, and a less-toothed and straighter PM line
Half-Wing (Phigalia titea) has a PM line that is not toothed near the costa
(compare images of all three species)
Print References
Internet References
adult images (Larry Line, Maryland)
presence in New York; list (Olive Natural Heritage Society, New York)
Works Cited
1.A revision of the New World Bistonini, (Lepidoptera, Geometridae).
Frederick H. Rindge. 1975. American Museum of Natural History 156(2):.
2.Arthropods of Florida and Neighboring Land Areas: Lepidoptera of Florida
J.B. Heppner. 2003. Florida Department of Agriculture 17(1): 1-670.
3.North American Moth Photographers Group