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

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

National Moth Week was July 23-31, 2022! See moth submissions.

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 Oecobius - Wall spiders

O. navus female - Oecobius navus - female Wall spider 1 - Oecobius navus Small Spider - Oecobius Oecobius navus? - Oecobius Very Tiny Spider - Oecobius - male O. putus male - Oecobius putus - male Unidentified spiderling - Oecobius spider in Sundale Neighborhood 2022 Aug 22 - Oecobius
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) Ranges have likely expanded for some of these species since then due to their synanthropic nature
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. annulipes - one BugGuide specimen from CO
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.