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Genus Uloborus

Spider 005 - Uloborus glomosus Uloborus female from grape 3 - Uloborus diversus - female promises, without venom - Uloborus glomosus - female Unknown Orb weaver? - Uloborus glomosus - male Uloborus sp? - Uloborus Araneae - Uloborus glomosus Spider at porch light - Uloborus glomosus Tiny spider - Uloborus diversus
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).