(Cobweb Weavers)

The spider family Theridiidae, commonly known as Cobweb Weavers, have been sighted 848 times by contributing members. Based on collected data, the geographic range for Theridiidae includes 34 countries and 48 states in the United States. Theridiidae is most often sighted indoors, and during the month of May.

Taxonomic Hierarchy

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Class: Arachnida
  • Order: Araneae
  • Suborder: Araneomorphae
  • Family: Theridiidae

Common Name (AASMore information icon)

Cobweb Weavers

Other Common Names

Cobweb Spiders, Cob Web Spiders, Comb-footed Spiders, Tangle-web Spiders, Gumfoot-web Spiders


Carl Jakob Sundevall, 1833

Sightings Overview

There have been 848 confirmed sightings of Theridiidae (Cobweb Weavers), with the most recent sighting submitted on February 15, 2019 by Spider ID member gas. The detailed statistics below may not utilize the complete dataset of 848 sightings because of certain Theridiidae sightings reporting incomplete data.

  • Web: 37% of the time, Theridiidae spiders are sighted in a spider web (Sample size: 720)
  • Sex: 159 female and 159 male.
  • Environment: Theridiidae has been sighted 270 times outdoors, and 482 times indoors.
  • Outdoors: Man-made structure (162). On flower (1). Low foliage (25). High foliage (11). Ground layer (23). Under rock or debris (28). Freshwater river, lake, stream (5). Open field, pasture, grassland (5). Forest (5). Desert area (5).

Location and Range

Theridiidae (Cobweb Weavers) has been sighted in the following countries: Argentina, Australia, Bahrain, Belgium, Brazil, Bulgaria, Canada, Chile, Curacao, Cyprus, Denmark, Ecuador, Germany, Hong Kong, India, Ireland, Israel, Jordan, Korea, South, Mexico, Nepal, Netherlands, New Zealand, Pakistan, Portugal, Slovakia, South Africa, Spain, Turkey, United Arab Emirates, United Kingdom, United States, Venezuela, Vietnam.

Theridiidae has also been sighted in the following states: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, 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, None, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, Wyoming.


Theridiidae has been primarily sighted during the month of May.

  • January: 71
  • February: 59
  • March: 109
  • April: 113
  • May: 159
  • June: 66
  • July: 28
  • August: 31
  • September: 19
  • October: 91
  • November: 20
  • December: 63

Genus: Anelosimus (Social Cobweb Spiders)

Genus: Ariamnes (Twig Spiders)

Genus: Asagena

Genus: Chrysso

Genus: Cryptachaea

Genus: Enoplognatha

Genus: Euryopis

Genus: Latrodectus (Widow Spiders)

Genus: Neospintharus

Genus: Nesticodes

Genus: Parasteatoda

Genus: Phoroncidia

Genus: Phylloneta

Genus: Rhomphaea

Genus: Spintharus

Genus: Steatoda (False Widows)

Genus: Theridion

Genus: Yunohamella

Featured Pictures

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Picture of Theridiidae (Cobweb Weavers) - Lateral Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Lateral Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Dorsal Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Ventral Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Dorsal Enlarge Picture
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