Parasteatoda tepidariorum, or the common house spider can be found in every US state. The spider is also distributed throughout most parts of the world and is often also referred to as the American house spider.
As the name suggests, the Common House Spider can often be found in basements, attics and crawl spaces as well as barns, privies, and stables. They tend to make their webs near human habitations, but try and stay out of the way of the humans at the same time.
The Parasteatoda tepidariorum are one of those spiders where you will find several adults living in close quarters. Often, their webs are built so close together, it looks like one continuous nest. Description – The abdomens will usually be a dull brown and patterned with strange shapes or splotches, or even look speckled. They have longer, thin, banded legs.
Common House Spider Specifics
The adult body will grow to about ¼” (6 mm). Including the legs they can reach over 1 inch.
The Common House Spider is of the Cobweb Spider family and the webs will be a haphazard tangle of thin webs.
The venom is a neurotoxin, similar to the black widow, but much less potent. Most bites will feel more like a bee sting and have no real effects.
On occasion, the female may deliver a sharp venomous bite that will cause some swelling, itchiness and possibly trigger antibody allergies that will pass with a little time.
The venom from the Common House Spider is sometimes extracted and sold as an insecticide for farming.
- Kingdom: Animalia
- Phylum: Arthropoda
- Subphylum: Chelicerata
- Class: Arachnida
- Order: Araneae
- Infraorder: Araneomorphae
- Family: Theridiidae
- Genus: Parasteatoda
- Species: Parasteatoda tepidariorum
Distribution of the common house spider in the USA
The common house spider can be found throughout the United States – Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming