In entomology, the combined body section of an insect that includes the thorax and the first part of the abdomen fused together, especially in ants.
Blend of 'alinotum' (a specialized wing-bearing region) and 'trunk,' coined by entomologists in the 20th century to describe this distinct body region in hymenoptera.
Ant scientists noticed that in ants, the middle and back sections of the body are structurally fused together in a way that's super different from other insects—calling it the 'alitrunk' helps them be precise about ant anatomy.
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