Ten legs (five pairs) including a claw-bearing pair with spines used for feeding and defense, followed by three pairs of sharply pointed walking legs, and a pair modified as flat swimming paddles at the rear, swimming legs.
structures at the end of abdomen: 2 in females, 3 (2 superior, 1 inferior) in male dragonflies, 4 (2 superior, 2 inferior) in male damselflies; distinctive of species