Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Family Ctenizidae - Cork-lid trapdoor spiders

Found in NC Goldfish Pond - Ummidia Big Black Spider - Ummidia - female TRAPDOOR SPIDER - female unknown spider - Ummidia - male Trapdoor spider - Ummidia - male Purseweb Spider Sphodros species (?) - Ummidia - male Ummidia spp. - Ummidia - male Cork-lid trapdoor spider - Ummidia - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Mygalomorphae (Mygalomorphs)
Family Ctenizidae (Cork-lid trapdoor spiders)
Explanation of Names
"Trapdoor spiders" because they make their homes in tubelike burrows completely lined with silk. They cut a lid which is attached on one side, like a hinged trapdoor. The top of the lid is camouflaged with debris. When they feel the vibration of prey, they rush out to capture it, then return to the burrow. Females rarely leave their burrows, but males may be found wandering in search of prey.
Size
10 - 30 mm
Print References
Spiders and Their Kin(1)
Works Cited
1.Spiders and Their Kin: A Golden Guide from St. Martin's Press
By Herbert W. Levi, Lorna R. Levi, Nicholas Strekalovsky