IdionellaIdionella is a genus of North American dwarf spiders that was first described by Nathan Banks in 1893.Speciesit contains eight species and one subspecies, found in Mexico and the United States:Idionella anomala – USAIdionella deserta – USAIdionella formosa – USA*Idionella f. pista – USAIdionella nesiotes – USA, MexicoIdionella rugosa – USAIdionella sclerata – USA, MexicoIdionella titivillitium – USAIdionella tugana – USA