Within the United States, Latrodectus mactans ranges as far north as Massachusetts and New Hampshire, as far south as Florida, and as far west as California, Texas, Oklahoma and Kansas. The black widow spider also occurs throughout all four deserts of the American southwest. In addition, Latrodectus mactans is found in Canada, Mexico, the West Indies, and South America.
Biogeographic Regions: nearctic (Native ); neotropical (Native )
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