Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

The Coleopterists Society supports BugGuide.


Geometridae, pupa out of cocoon - Alsophila pometaria - female

Geometridae, pupa out of cocoon - Alsophila pometaria - Female
100 Acre Wood, Winneshiek County, Iowa, USA
September 14, 2011
Size: 7 mm
Question: Evolutionarily speaking, did this female moth have wings and then give them up? Because it looks as if the pupa has wing placeholders.

04-Jun-2011 Larva collected on Triosteum aurantiacum
17-Jun-2011 Notes say: "I think it made a cell in the peat" (at bottom of rearing container).
14-Sep-2011 Opened the peat coccoon to a perfectly formed pupa, but pupa completely still. Lovely color.
25-Dec-2011 Drat, a wingless female emerged and I completely missed it. She was in one of the rearing containers sitting right here, where I could keep an eye on it.

Images of this individual: tag all
Geometridae, pupa out of cocoon - Alsophila pometaria - female Geometridae, larva, dorsal - Alsophila pometaria Geometridae, larva, lateral - Alsophila pometaria - female Geometridae, adult - Alsophila pometaria - female Geometridae, spent pupal case out of cocoon - Alsophila pometaria - female

All wingless moths are descended from winged ancestors, so those are vestigial wing pads in the pupal case. That's neat, I wouldn't have expected them to be there.

Yes, surprising.
At least one wouldn't expect them to be so well devloped.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.