Animals that can sting:
Ants, Bees, Wasps, Scorpions, and Jellyfish
If we define a sting as a venom injected *at will* for defense or hunting this ability has evolved multiple times. Cnidarians were ...
@nprofile1q... precedent for considering spider or snake bites stings: cone snails are described as stinging, and their delivery method is the radula, their tooth equivalent