Parasteatoda tepidariorum
(Common House Spider)

Featured spider picture The spider species Parasteatoda tepidariorum, commonly known as Common House Spider, belongs to the genus Parasteatoda, in the family Theridiidae. Parasteatoda tepidariorum spiders have been sighted 87 times by contributing members. Based on collected data, the geographic range for Parasteatoda tepidariorum includes 2 countries and 23 states in the United States. Parasteatoda tepidariorum is most often sighted indoors, and during the month of August.

Taxonomic Hierarchy

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Class: Arachnida
  • Order: Araneae
  • Suborder: Araneomorphae
  • Family: Theridiidae
  • Genus: Parasteatoda
  • Species: Parasteatoda tepidariorum

Common Name (AASMore information icon)

Common House Spider

Other Common Names

American House Spider, Cobweb Spider, Cob Web Spider, Comb-footed Spider, Tangle-web Spider, Gumfoot-web Spider


Carl Ludwig Koch, 1841

Primary Colors

Sightings Overview

There have been 87 confirmed sightings of Parasteatoda tepidariorum (Common House Spider), with the most recent sighting submitted on January 4, 2019 by Spider ID member cocoman280. The detailed statistics below may not utilize the complete dataset of 87 sightings because of certain Parasteatoda tepidariorum sightings reporting incomplete data.

  • Web: 73% of the time, Parasteatoda tepidariorum spiders are sighted in a spider web (Sample size: 45)
  • Sex: 40 female and 22 male.
  • Environment: Parasteatoda tepidariorum has been sighted 22 times outdoors, and 24 times indoors.
  • Outdoors: Man-made structure (19). Ground layer (1). Under rock or debris (1). Freshwater river, lake, stream (1).

Location and Range

Parasteatoda tepidariorum (Common House Spider) has been sighted in the following countries: Spain, United States.

Parasteatoda tepidariorum has also been sighted in the following states: Alabama, California, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Missouri, New Hampshire, New York, None, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Virginia, Washington, West Virginia.


Parasteatoda tepidariorum has been primarily sighted during the month of August.

  • January: 2
  • February: 4
  • March: 11
  • April: 7
  • May: 12
  • June: 9
  • July: 3
  • August: 15
  • September: 5
  • October: 9
  • November: 5
  • December:

Additional Remarks

  • Sometimes mistaken for a “brown widow,” Latrodectus geometricus.
  • Other species in genus Parasteatoda can be mistaken for P. tepidariorum, too; genus Tidarren is also fairly similar in color and shape.
  • This species is quite the athlete, often subduing prey that is much, much larger than itself. We have personally witnessed prey to include other spiders such as the foldingdoor spider, Antrodiaetus pacificus, and even small lizards. Guarisco (1988) documented this spider feeding on a Sphodros fitchi, a species of purseweb spider.
  • Egg sacs are made of brown, papery-looking silk and shaped like a teardrop, about 6-9mm in diameter with anywhere from 100-500 eggs inside. Females can produce as many as 17 egg sacs in their lifetime (average is more like ~10).
  • Males are much smaller than the females and are more orange-red in coloration.

Featured Pictures

Picture of Parasteatoda tepidariorum (Common House Spider) - Female - Egg sacs,Ventral Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Exuviae,Lateral Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Female - Egg sacs,Lateral Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Dorsal,Egg sacs Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Male - Dorsal Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Dorsal Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Female - Dorsal,Egg sacs,Spiderlings Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Female - Egg sacs,Lateral,Spiderlings,Webs Enlarge Picture
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