(3.8 cm) across but may be smaller. Black widow spiders (Latrodectus mactans) are found throughout the United States. However, such general "common names" are of limited use as the diversity of species is much greater. Female black widows are usually about 1.5 in. Iowa City Iowa physician directory -Spider bites in the US usually are harmless, and you can treat them at home, but a bite from a black widow or brown recluse spider can be dangerous, and needs treatment by a doctor. Black widow spiders spin messy, irregular webs near ground level. The spider species Steatoda grossa, commonly known as False Black Widow, belongs to the genus Steatoda, in the family Theridiidae.Steatoda grossa spiders have been sighted 177 times by contributing members. The spiders derive their name from the popular assertion that the female black widow spider feeds on the male spiders after mating. Both males and females have dark brown legs and a … The southern black widow’s range is largely limited to the southeastern US states, while the northern variety can be found as far north as New Jersey. The western black widow is also responsible for a significant amount of threatening envenomations, but this … One of the most dangerous spiders in the U.S..... the BLACK WIDOW! The black house spider is a dark colored spider, more bulky and awkward in appearance than widow spiders. Female black widows are long-legged, shiny, coal-black spiders with an orange, red, or yellow hourglass shape on their underside. Latrodectus is a broadly distributed genus of spiders with several species that, together, are referred to as true widows.This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. Look for them in dark, secluded and protected areas like boxes, firewood, corners, closets, basements and areas filled with clutter. Black widow spiders can be found on every continent except Antarctica and mainly inhabit warmer regions. Description . The males don’t have the red markings and are half the size of the females. They sometimes spin webs during the daytime and are often found hanging upside down, with their hourglass marking exposed. Symptoms of a spider bite are pain, irritation, and redness. WARRANTY REGISTRATION Submit a Warranty Claim Since 1979, we've built over 120,000 custom vehicles from our 150,000 square foot, state-of-the-art manufacturing facility headquartered in Trussville, AL. 3 Black widow Kimberly Hosey Getty Images What they look like: Black widows have a shiny black color and are known for their red hourglass-shaped marking on the underside of the abdomen, says Potzler. They can also be identified by their comb foot, a row of strong, curved bristles on the hind pair of legs. Nissan Titan Black Widow RAM Lifted Trucks SEARCH INVENTORY WARRANTY. Spiders—especially famously venomous varieties like the Black Widow—are at the top of a lot of people’s lists when it comes to fears. Based on collected data, the geographic range for Steatoda grossa includes 13 countries and 12 states in the United States. Black Widow spider females are shiny black, between 3-10mm (0.12-0.4in), with red, orange, or yellow spots or an hourglass shape on the underside of their abdomen.