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

Genus Ummidia

Ummidia - male Two spiders about 50 mm in length - two within a yard of each other - Ummidia Trapdoor Spider? - Ummidia Mini tarantula? - Ummidia cam someone help my identify this guy please? not fun to wake up too btw lol - Ummidia Ummidia sp.? - Ummidia Ummidia  - Ummidia - male Is this the venomous kind of Australian mouse spider (Missulena something?) or.... nothing to worry about? - Ummidia
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Mygalomorphae (Mygalomorphs)
Family Halonoproctidae (Cork-lid trapdoor spiders)
Genus Ummidia
Explanation of Names
Perhaps named for a famous Roman Woman, Ummidia Quadratilla.

Gender: Feminine
Circa 17 mm
saddle-like depression on tibia of third leg
Virginia south to Florida, west to Arizona, also neotropics.
Predatory on terrestrial invertebrates
Life Cycle
Dig tunnel in ground and seal with a silk-hinged lid. They hide under this lid and make forays out when prey is sensed, presumably by vibration. Males are often found wandering in late spring, presumably looking for mates.
Print References
Roddy, L. R. (1957). Some spiders from southeastern Louisiana. Transactions of the American Microscopical Society 76: 285-295.

Chamberlin, R. V. & Ivie, W. (1945a). On some Nearctic mygalomorph spiders. Annals of the Entomological Society of America 38: 549-558.