B. Wikström 1999: Teratological male genitalia among Coleophora species (Lepidoptera, Coleophoridae). - Entomologica Fennica 10: 167-169.
The author has studied and determined Coleophora species occurring in Finland through examining their genitalia. Several thousands of microscopic slides have been prepared representing more than one hundred different species. More than thirty specimens with completely or partly undeveloped male genitalia representing 11 species have been discovered.