Dysodia granulata

Distinguished from the diurnal genus Thyris by larger body size, heavier build, and nocturnal activity pattern. The translucent wing spots (the "windows" characteristic of family Thyrididae) are present but may differ in pattern from other Dysodia species; specific diagnostic features for D. granulata versus other Dysodia species are not documented in available sources.

Slightly larger and heavier-bodied than related window-winged moth genera. Like other Thyrididae, possesses square or rectangular translucent spots in the wings that appear white or amber in color.

Attracted to lights in arid and semi-arid regions. Associated with habitats where host plants for larval development occur.

Recorded from southern Arizona and the Lower Rio Grande Valley in southernmost Texas, USA. The broader distribution within North America is not well documented in available sources.

Adult activity period not specifically documented for this species; general Dysodia genus observations suggest nocturnal flight activity when adults are present.

Larval stage characterized by leaf-rolling behavior: caterpillars roll leaves of host plant and tie them with silk, forming both shelter and feeding site. Specific host plants for D. granulata not documented; other Dysodia species use various host plants.

Nocturnal; adults attracted to artificial light sources. Flight behavior and other adult activities not specifically documented.

• Thyris maculataBoth are window-winged moths (Thyrididae) with translucent wing spots, but T. maculata is diurnal, smaller, and more slender-bodied; D. granulata is nocturnal, larger, and heavier-bodied.
• Other Dysodia speciesAt least four Dysodia species occur in the U.S.; D. granulata may be distinguished by geographic range and subtle morphological differences, though specific diagnostic characters are not well documented in available sources.

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life
• Bug Eric: Window-winged Moths