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For Insects, Spiders & Their Kin
For the United States & Canada
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Genus Uloborus

very small rusty spider - Uloborus glomosus Araneus sp. - Uloborus - female Uloborus Spider - Uloborus glomosus - female U diversus female - Uloborus diversus - female Uloborus species - Uloborus Spider id. - Uloborus glomosus Possible Uloborus campestratus - Uloborus campestratus Five months of Uloborus, part 5: December - Uloborus glomosus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Uloboridae (Cribellate Orb Weavers)
Genus Uloborus
Explanation of Names
From Greek ouloboros (ουλοβορος)- "with deadly bite"
Ironically, this genus- like the rest of its family, and unlike most or all other spiders- has no venom.
4 species in the USA
campestratus (cinereus) - USA - Florida and gulf states, eastern and southern Mexico.
diversus - USA - Widespread in the western US from Oregon, Utah and eastern Arizona south into western Mexico.
glomosus - USA - Widespread in the the eastern US, north into southern Canada, south into Mexico.
segregatus - USA - Lower Rio Grande Valley of Texas and adjacent Mexico.
Some species from this genus were moved to Philoponella.
Internet References
~ - Detailed descriptions, maps & drawings. Muma & Gertsch, 1964 (PDF).