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What functions can a female hymenopteran’s ovipositor perform?
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Hymenoptera
An endangered rusty patched bumblebee (Bombus affinis) browsing on a wild bergamot flower.
In female Hymenoptera, the ovipositor is a versatile organ located at the tip of the abdomen that has evolved to perform several specialized functions beyond its primary role of egg-laying.12
Depending on the species, the ovipositor may be modified for the following tasks:
- Sawing: In sawflies, the organ is adapted into a sawlike tool used to cut slits into plant stems or leaves to deposit eggs.12
- Drilling: Certain parasitic wasps, such as some ichneumonids, use their ovipositors as drills capable of penetrating solid wood to reach hosts concealed deep within plant tissues.3
- Piercing and Stinging: In most other Hymenoptera, the ovipositor is modified for piercing or stinging. While primarily used for oviposition or defense, in some species, it serves as a defensive weapon against predators or vertebrate animals.123
These adaptations reflect the diverse ecological strategies found within the order, ranging from herbivory to complex parasitoid behaviors.13