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

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

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

National Moth Week 2020 photos of insects and people.

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

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Previous events


Genus Oecobius - Wall spiders

Wall Spider - Oecobius Unidentified Spider 12 - Oecobius Wall Spider - Oecobius Wall spider - Oecobius navus Tiny Spider - Oecobius Penguin-looking Spider - Oecobius Penguin-looking Spider - Oecobius Oecobius annulipes - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Oecobiidae (Wall spiders)
Genus Oecobius (Wall spiders)
Synonyms and other taxonomic changes
Explanation of Names
Greek oikos (οικος)- "house" + bios (βιος)- "living"

'Living in the house'(1)
Seven species in US.(1) Two additional species have been introduced recently.
From Shear 1970:(2)
O. concinnus - southern FL
O. cellarorium - AZ, NM, TX, OK, NB, MO, AR, KY, NC, VA, WV, MD
O. interpellator - MA
O. isolatus - southern CA, AZ, Mexico
O. isolatoides - AZ, Mexico
O. navus - OR, CA, AZ, TX, LA, MS, AL, FL, KY, NY, MA, Mexico
O. putus - southern CA, AZ, NM, western TX, Mexico

Introduced species:
O. amboseli - BugGuide has photos from BC
O. maculatus - BugGuide has photos from CA, AZ
houses, stucco walls, under bark on trees and grape vines, rocks
ants, other small insects
Very small spiders that make flat webs on walls and similar surfaces. The spider rests underneath the web.
Print References
Link to 1970 revision of genus by Shear is on p. 129 - here.
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.
2.The spider family Oecobiidae in North America, Mexico, and the West Indies
William A. Shear. 1970. Bulletin of the Museum of Natural History Harvard 140(4): 129-164.