Ohio has a moderately diverse spider fauna. There are over 580 species known from the state and the true number is probably close to 600 species. There are representatives of 39 families of spiders found in Ohio, the most important families (in proportion of species represented) are the orb weavers Araneidae (9.5 % of Ohio species), ground spiders Gnaphosidae (7 % of Ohio species), sheet web weavers Linyphiidae (16 % of Ohio species), wolf spiders Lycosidae (9 % of Ohio species), jumping spiders Salticidae (13 % of Ohio species), cobweb weavers Theridiidae (9 % of Ohio species), and crab spiders Thomisidae (8 % of Ohio species). Thus, these seven families comprise about 72 % of the Ohio list.