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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1 January 2007
Sexual Dimorphism of Basitarsi in Pest Species of Diabrotica and Cerotoma (Coleoptera: Chrysomelidae)
Leslie Hammack,
Bryan Wade French
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Annals of the Entomological Society of America
Vol. 100 • No. 1
January 2007
Vol. 100 • No. 1
January 2007
basitarsal pad
bean leaf beetle
corn rootworm beetle
sexual dimorphism