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Latrodectus is a broadly distributed genus of spiders with several species that are commonly known as the true widows.This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders.
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.
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 red, yellow, and on rare occasions, white.
The redback spider (Latrodectus hasselti), also known as the Australian black widow, [2] [3] [4] is a species of highly venomous spider believed to originate in Australia but now, Southeast Asia and New Zealand, it has also been found in packing crates in the United States with colonies elsewhere outside Australia. [5]
Black widows, once L.A.’s ruling widow, have been pushed out of the urban core by the brown widow over the last 15 years or so, according to Gonzalez. Native black widows are still doing well on ...
Conversely, redback and North American black widows live in proximity with people and several hundred black widow bites are reported to Poison Control in the United States each year. Of the bites reported in the United States from 2001 to 2005, approximately 31% were treated in a health care facility, 0.5% had major complications, and none were ...
Known world distribution of Latrodectus karooensis. Latrodectus karrooensis is a species of spider in the family Theridiidae, found in South Africa. [1] It is one of six species of Latrodectus found in southern Africa, four of which, including L. karrooensis, are known as black button or black widow spiders.
Like all spiders in the genus Latrodectus, females are larger than males. Females range from 7 to 16 mm, and the males 2.5 to 5 mm. In maturity, most retain at least short red stripes radiating upward from the tip of the dorsal abdomen. Like many black widows, it is not aggressive.