Quantification of cantharidin in canthariphilous ceratopogonidae (Diptera), anthomyiidae (Diptera) and cantharidin-producing oedemeridae (Coleoptera)
Frenzel, M. | Dettner, K.
Cantharidin contents were determined in several canthariphilous insects by means of quantitative gas chromatography. Usually the ceratopogonids Atrichopogon oedemerarum and A. trifasciatus caught in the field contained low concentrations of cantharidin, with concentrations in males, in most cases, being lower than in females. When fed in the laboratory with synthetic cantharidin, these species concentrated cantharidin by as much as 100-fold (males) and 40-fold (females). Accumulation in the different body tagmata (head, thorax, abdomen) of these species is similar. Maximal concentrations of cantharidin in tissues of Atrichopogon are comparable to those known from oedemerid and meloid beetles. In A. trifasciatus about 90% of total cantharidin content is bound in tissues. Investigations using the canthariphilous anthomyiid fly Anthomyia pluvialis and three cantharidin-producing oedemerid species revealed the same pattern of distribution in different body tagmata as in Atrichopogon.
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