"iNat user cumaliyesil photographed quite a scene in Turkey:
A female Goblet-marked Damselfly (Erythromma lindenii) with the abdomen of a male still attached to her body — it’s our Observation of the Day!
When mating, the male damselfly will use claspers at the rear of his abdomen to hold the female behind the head, and she bends her abdomen around to pick up a sperm packet from his body.
In some instances, the male will continue to hold onto her when she oviposits (lays eggs). In this case, the male was perhaps predated on, but only his thorax and head were taken, leaving his abdomen attached to the female.