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Genus Lytrosis

Common Lytrosis - Hodges#6720 - Lytrosis unitaria - male Lytrosis unitaria? - Lytrosis unitaria - female Common Lytrosis - Hodges #6720 (Lytrosis unitaria) - Lytrosis unitaria - male Common Lytrosis - Lytrosis unitaria Moth  - Lytrosis unitaria - male Inchworm pretending to be a hazelnut twig - Lytrosis unitaria Lytrosis unitaria Common Lytrosis - Lytrosis unitaria - 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 Angeronini
Genus Lytrosis
Synonyms and other taxonomic changes
Lytrosis Hulst, 1896
There are 4 species in the genus. (1)
Adults: (based on maculation and color)
This visual key below is adapted from the revision by FREDERICK H. RINDGE. (1) (1971)
1. Upper surface of wings uniformly pale gray; hind tibia of male with hair pencil = permagnaria

Upper surface of wings various shades of light brown, dark brown, and yellow; hind tibia of male without hair pencil = 2
2. Upper surface of forewings with both AM and PM lines clearly defined and tending to be sinuous in course, and with median area yellowish or pale ochraceous gray, contrasting with noticeably darker brown and blackish brown basal and outer areas = 3
Upper surface of forewings with both AM and PM lines tending to be relatively straight, the former tending to be weakly represented, and with median area not yellow, tending to be concolorous with basal area and only slightly paler than brown outer area = unitaria

3. Upper surface of forewings with basal and outer areas pale to medium brown and with median area light yellow = sinuosa

Upper surface of forewings with basal and outer areas dark grayish brown or blackish brown, and with median area pale ochraceous gray = heitzmanorum

Note: The differences in the coloring of the wings, of the last two species listed above, (heitzmanorum & sinuosa) may not show up very well in our images, as well as images of the pinned specimens on MPG and BOLD. (Bob Biagi 2021)

eastern NA (1)
See Also
Check out the similar moths in the genus Euchlaena.
Print References
Works Cited
1.A revision of the moth genus Lytrosis (Lepidoptera, Geometridae)
Frederick H. Rindge. 1971. American Museum Novitates, 2474: 1-21.
2.Lytrosis (Hulst) of Louisiana
Vernon Antoine Brou Jr. 2005. Southern Lepidopterists' News, 27:7.