8. Black widow (Latrodectus mactans)
LD50 value: 0.59
Black widow ranks 8th in our list of the 10 most venomous spiders in the world. This species of black widow spiders is native to North America, and very well known for its highly toxic venom. The infamous name that this spider carries comes from the myth that female devours male after mating, but that claim remains a myth, as researches have shown.
