Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. the northern black widow L. variolus (Walckenaer) and the western black widow L. hesperus Chamberlin & Ivie. The genus of spiders, to which the black widow belongs, contains the largest number of venomous species known. is a spider notorious for its neurotoxic venom (a toxin that acts specifically on nerve cells).. The Black Widow spider (Latrodectus spp.) The black widow spider also occurs throughout all four deserts of the American southwest. This article is for information only. You would thing that massive hairy Wolf-Spider would be pwning noobs but dayum. 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. The Black Widow Spider is a large widow spider found throughout the world and commonly associated with urban habitats or agricultural areas. Several species occur in the United States, but the western widow, Latrodectus hesperus, is the overwhelmingly dominant species throughout Colorado. [From the fact that the female eats only rarely eats the male after mating, .] (The true black widow, Latrodectus mactans, is more common in eastern and southern areas of the country.) The silk that creates the web is made up of a liquid from the large abdominal glands. Latrodectus hesperus. Worldwide, about 31 … The female's body is 14–16 millimeters in length and is black, often with an hourglass shaped red mark on the lower abdomen. This site, from the US army – has a rundown of all North American widow species ... that’d be a western black widow. Western black widow spiders spin webs that do not take on a definite shape or form. Black widow spiders seem to be universally feared. Latrodectus mactans. Both the northern and the southern black widows are found in Tennessee, with the southern species being most common. But who's scared of a brown widow? The females are well known for their distinctive black and red coloring and for the fact that they will occasionally eat their mate after reproduction. The widow spiders are a group of related spiders in the genus Latrodectus. Latrodectus hesperus spiders have been sighted 54 times by contributing members. A Wolf Spider and a Black Widow fighting viciously. The black widow spider (Latrodectus genus) has a shiny black body with a red hourglass-shape on its belly area. they’re present, in great numbers, all around this town. In addition, Latrodectus mactans is found in Canada, Mexico, the West Indies, and South America. The Western black widow spider inhabits areas of the western USA, Canada and parts of Mexico, although these western black widow spiders are often confused for the False black widow spider in Canada. The glands open on the surface of the black widow's abdomen at the spinnerets. Latrodectus mactans spiders have been sighted 31 times by contributing members. The venomous bite of a black widow spider is toxic. Best Answer: A poisonous New World spider (Latrodectus mactans), the female of which produces extremely toxic venom and has a black shiny body with red markings. 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.