(Cobweb Weavers)

The spider family Theridiidae, commonly known as Cobweb Weavers, have been sighted 439 times by contributing members. Based on collected data, the geographic range for Theridiidae includes 28 countries and 43 states in the United States. Theridiidae is most often sighted indoors, and during the month of March.

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 439 confirmed sightings of Theridiidae (Cobweb Weavers), with the most recent sighting submitted on April 20, 2018 by Spider ID member kas8909. The detailed statistics below may not utilize the complete dataset of 439 sightings because of certain Theridiidae sightings reporting incomplete data.

  • Web: 39% of the time, Theridiidae spiders are sighted in a spider web (Sample size: 312)
  • Sex:¬†122 female and 78 male.
  • Environment:¬†Theridiidae has been sighted 125 times outdoors, and 201 times indoors.
  • Outdoors: Man-made structure (74). On flower (1). Low foliage (11). High foliage (5). Ground layer (16). Under rock or debris (10). Freshwater river, lake, stream (3). Open field, pasture, grassland (3). Forest (1). Desert area (1).

Location and Range

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

Theridiidae has also been sighted in the following states: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Jersey, New Mexico, New York, None, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, Wyoming.


Theridiidae has been primarily sighted during the month of March.

  • January: 45
  • February: 53
  • March: 107
  • April: 79
  • May: 13
  • June: 25
  • July: 23
  • August: 28
  • September: 12
  • October: 14
  • November: 11
  • December: 11

Genus: Anelosimus (Social Cobweb Spiders)

Genus: Asagena

Genus: Chrysso

Genus: Cryptachaea

Genus: Enoplognatha

Genus: Euryopis

Genus: Latrodectus (Widow Spiders)

Genus: Neospintharus

Genus: Nesticodes

Genus: Parasteatoda

Genus: Rhomphaea

Genus: Spintharus

Genus: Steatoda (False Widows)

Genus: Theridion

Featured Pictures

Picture of Theridiidae (Cobweb Weavers) Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Lateral,Webs Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Webs Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Lateral Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Dorsal Enlarge Picture
Picture of Theridiidae (Cobweb Weavers) - Dorsal Enlarge Picture
View All Pictures