Caption Insects incorporated two ancestral crustacean leg segments (labeled 7 in red and 8 in pink) into the body wall. The lobe on leg segment 8 later formed the wing in insects, while this ...

Flying insects are the large dragonflies (meganeura). At the top centre of the image is a Homoioptera with a pair of long tails. In the front of the pair of wings, it has a of pair flap-like ...