Stinger

In a small number of cases, the second occasion of a bee or wasp sting causes a severe allergic reaction known as anaphylaxis.

Animals with stings include bees, wasps (including hornets), some ants like fire ants, and scorpions,[2][3] as well as a single beetle species (Onychocerus albitarsis) that can deliver a venomous sting from its antennae, whose terminal segments have evolved to resemble a scorpion's tail.

The 5-HT in these venoms has been found to play at least two roles: one as a pain-producing agent and the other in the distribution and penetration of the paralyzing components to vulnerable sites in the offender.

Centipedes also possess a venomous bite rather than a sting, inflicted with a highly modified first pair of legs, called forcipules.

These organs include the modified dermal denticle of the stingray, the venomous spurs on the hind legs of the male platypus, and the cnidocyte tentacles of the jellyfish.