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Species Chionodes occlusa - Hodges#2101

Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Gelechioidea (Twirler Moths and kin)
Family Gelechiidae (Twirler Moths)
Subfamily Gelechiinae
Tribe Gelechiini
Genus Chionodes
No Taxon (lugubrella group)
No Taxon (holosericella complex)
Species occlusa (Chionodes occlusa - Hodges#2101)
Hodges Number
2101
Synonyms and other taxonomic changes
Chionodes occlusa (Braun, 1925)
Gelechia occlusa Braun, 1925
Remarks
Some females in the lugubrella-group have slightly more narrow wings than do males. Sattler (1991: 268) notes ". . . some Chionodes species ... , slight sexual differences in wing shape are observed, with the females having distally narrower fore wings than the males. Sexual wing dimorphism of such kind is seen as representing a trend towards brachyptery (Sattler, 1986: 258), and the existence of distinctly brachypterous species in Eulamprotes Bradley and Acompsia Hilbner further supports this interpretation." Huemer and Sattler (1995: 11) reported no observations of flightless females in Chionodes. At Cottonwood Pass, Colorado, I collected a single female specimen of Chionodes occlusus that is strongly brachypterous (plate 5, figure 2). The forewings are very short and stubby, and the hindwings reduced even further. Because females of several North American species in the lugubrella-group are unknown, the question arises whether some of these species have flightless females or the females simply are not attracted to light. (1)

Females of this species collected elsewhere are flighted.
Internet References
Works Cited
1.The Moths of America North of Mexico. Fascicle 7.6. Gelechioidea, Gelechiidae, Gelechiinae (part: Chionodes)
Ronald W. Hodges. 1999. The Wedge Entomological Research Foundation.