The 621 species of spiders known to occur in Utah as recorded in the literature or Utah universities' collections are listed with their junior synonyms and collection localities. Two-fifths (265 species) are known from only one locality each, and only one-fifth (123 species) from five or more localities in the state.
Allred, Dorald M. and Kaston, B. J.
"A list of Utah spiders, with their localities,"
Great Basin Naturalist: Vol. 43
, Article 22.
Available at: http://scholarsarchive.byu.edu/gbn/vol43/iss3/22