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Latrodectus mactans, known as southern black widow or simply black widow, and the shoe-button spider, [citation needed] is a venomous species of spider in the genus Latrodectus. The females are well known for their distinctive black and red coloring and for the fact that they will occasionally eat their mates after reproduction.
Elsewhere, others include the European black widow (Latrodectus tredecimguttatus), the Australian redback spider (Latrodectus hasseltii) and the closely related New Zealand katipō (Latrodectus katipo), several different species in Southern Africa that can be called button spiders, and the South American black-widow spiders (Latrodectus ...
Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. The female's body is 14–16 mm (1/2 in) in length and is black, often with an hourglass-shaped red mark on the lower abdomen. This "hourglass" mark can be yellow, and on rare occasions, white.
How to Identify a Black Widow Spider. There's probably a specific image that comes to mind when you picture a black widow spider: A large, shiny, black spider with a red hourglass on its belly ...
A black widow spider is seen here in this stock photo. Mark Kostich/Getty Images/iStockphoto. While many black widow species are recognized throughout the U.S. and the world at large, the southern ...
The black widow spider usually hangs in its web in an upside down position. “If you happen to be messing around in an old shed somewhere and you put your hand somewhere and you touch some silk ...
α-Latrotoxin (α-LTX) can naturally be found in widow spiders of the genus Latrodectus. The most widely known of those spiders are the black widows, Latrodectus mactans. [4] The venom of widow spiders (Latrodectus) contains several protein toxins, called latrotoxins, which selectively target either vertebrates, insects or crustaceans. One of ...
A black widow spider travels along her web. Black widows sometimes have various marks on their back beside the red hourglass, including yellowish-orange shapes, two marks or a single dot, and ...