What are the swollen segments found at the connection between the thorax and abdomen of ants called?

The swollen segments found at the connection between the thorax and abdomen of ants are referred to as nodes. These nodes serve an important structural and functional role, as they are part of the waist or petiole, which distinguishes ants from other insects. The presence of these nodes is a characteristic feature of ants, providing flexibility and allowing for a greater range of movement compared to insects without such adaptations. The segmentation at this junction also plays a role in the identification of different ant species, as the number and form of the nodes can vary widely among them. This anatomical feature is critical for understanding ant morphology and behavior in the context of entomology and pest management.