Discovery of sexual wing dimorphism in Staphylinidae (Coleoptera) - Omalium flavidum, and a discussion of wing dimorphism in insects

  • Thayer M
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Abstract

Wing reduction and wing dimorphism in both sexes of an insect species are widespread phenomena. Sexual dimorphism in wing development is less common, and is previously unrecorded in the large beetle family Staphylinidae. Omalium flavidum Hamilton, a little-known forest staphylinid widespread in northeastern North America, has unusual wing dimorphism: flightless females and males, with minute vestigial wings and modifications often associated with wing loss; and fully-winged males, with distinctly elongate antennae, elytra, and legs. Occurrence of this and other patterns of sex-linked wing dimorphism in insects is reviewed and discussed. Omalium flavidum is redescribed and illustrated and a lectotype is designated for the species.

Author-supplied keywords

  • Coleoptera
  • Staphilinidae
  • sexual dimorphism
  • wing dimorphism

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Authors

  • M K Thayer

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