metathorax are fused together to form the synthorax.

In some insect pupae, like the mosquitoes', the head and thorax can be fused in a cephalothorax.

Members of suborder Apocrita (wasps, ants and bees) in the order Hymenoptera have the first segment of the abdomen fused with the thorax, which is called the propodeum. The head is connected to the

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