Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

See Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Genus Steatoda

Cobweb Spider - Steatoda triangulosa Funnel making 'brown widow' spider, Steatoda? - Steatoda nobilis - female Steatoda Borealis - Steatoda borealis Steatoda borealis - female Small male spider with brown abdomen and shiny black cephalothorax - Steatoda - male Brown Spider - Steatoda triangulosa Spider - Steatoda borealis Wall spider. Thick extensive web emanating from a funnel-shaped area in which the spider normal resides. - Steatoda nobilis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Theridiidae (Cobweb Spiders)
Genus Steatoda
20 species in our region. (1)
19 species and one subspecies according to the World Spider Catalog. Changes in taxonomy may be the reason for this discrepancy. S. americana and pulchra have been moved to Asagena.
Females: 2.5-11.0 mm; Males: 2.0-7.5 mm. (1)
Coloration purple-brown, often with white line around anterior of abdomen and other markings. Large colulus.

Steatoda variata
More specific range information will be added when time/resources allow.

S. alamosa
S. albomaculata - Southern Canada to central Mexico
S. apacheana
S. atascadera
S. borealis (only one in AK)
S. castanea (Canada)
S. erigoniformis (tropical)
S. grandis
S. hespera - Western United States
S. mexicana
S. nobilis - Ventura County, CA
S. palomara - San Diego County, CA
S. punctulata
S. quadrimaculata
S. transversa
S. triangulosa - Widespread in the United States.
S. variata - UT, AZ, CO, NM, western TX, Mexico
- variata china - very southern tip of TX
S. washona
See Also
Internet References - PDF Article, The fulva group of the spider genus Steatoda (Araneae, Theridiidae). Gertsch, 1960. (good reference) - PDF Article, Spider Genera Crustulina and Steatoda. Levi, 1957. (good reference)
Works Cited
1.Spiders of North America: An Identification Manual
D. Ubick, P. Paquin, P.E. Cushing and V. Roth (eds). 2005. American Arachnological Society.