Ring width/height: 30x19 mm.
Adjustable size Ø 17-19 mm

Black widow is a highly venomous species of spider in the genus Latrodectus. They are well known for the distinctive black and red coloring of the female of the species and for the fact that she will occasionally eat her mate after reproduction. The species is native to the United States of America and Mexico. The female black widow's venom is particularly harmful to humans. The injection of venom from these species is a comparatively dangerous or lethal bite.

Although these spiders are not especially large, their venom is extremely potent. Compared to many other species of spiders, their chelicerae are not very large or powerful. In the case of a mature female, the hollow, needle shaped part of each chelicera, the part that penetrates the skin, is approximately 1.0 millimeters long, long enough to inject the venom to a point where it can be harmful.

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