Sexual Dimorphism of Basitarsi in Pest Species of Diabrotica and Cerotoma (Coleoptera: Chrysomelidae)

Paper: 50
Year: 2007
Authors: Hammack, L. and B. W. French
Title: Sexual Dimorphism of Basitarsi in Pest Species of Diabrotica and Cerotoma (Coleoptera: Chrysomelidae)
Journal: Annals of the Entomological Society of America
Volume: 100
Keyword: corn rootworm beetle, bean leaf beetle, basitarsal pad, sexual dimorphism
Summary: Sexual dimorphism in basitarsal pad morphology is described for prothoracic and
mesothoracic legs of Diabrotica virgifera virgifera LeConte, Diabrotica barberi Smith&Lawrence, and
Diabrotica undecimpunctata howardi Barber (Coleoptera: Chrysomelidae) and for prothoracic legs of
Cerotoma trifurcata (Forster) (Coleoptera: Chrysomelidae). On the indicated legs of these diabroticite
beetles, the typical structure of the hairy tarsal pads of chrysomelid beetles is replaced proximally
on tarsomere 1 of males by a hairless planar ovoid patch that may facilitate maintenance of the mating
posture of males upon the elytra of females. This basitarsal patch proved as reliable as the standard
supra-anal plate character for establishing sex of these important crop pests.
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