Evidence of sperm displacement in Ischnura aurora (Brauer) (Zygoptera: Coenagrionidae)

Five spindle-shaped sperm ‘pellets’ (bundles) were found in the vagina of copulation-interrupted androchrome 2. The second and third pellets had a long thin tail while the fourth had partly and the fifth completely disintegrated. In an other 2, the vagina was packed with sperm material even though the sperm storage organs (spermatheca and bursa copulatrix) were completely filled. It is proposed that this sp. exhibits a transitional reproductive behaviour with respect to sperm competition.