A highly venomous African spider which is a close relative of the American black widow.
- A subspecies of Latrodectus mactans, family Theridiidae
- A person who has been bitten by a black button spider needs to be hospitalised and treated with anti-venom.
- The button spiders have round abdomens with slender legs of which the third pair of legs is the shortest.
- Some of the species with very toxic venom are the button spider and the black widow.
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