- family: Nesticidae
- family: Theridiidae
- genus: Enoplognatha
- genus: Keijia
- genus: Nesticodes
- genus: Paratheridula
- genus: Rugathodes
- genus: Simitidion
- genus: Steatoda
- genus: Takayus
- genus: Theridion
- species: Theridion agrifoliae Levi, 1957
- species: Theridion albidum Banks, 1895
- species: Theridion arizonense Levi, 1957
- species: Theridion australe Banks, 1899
- species: Theridion californicum Banks, 1904
- species: Theridion cameronense Levi, 1957
- species: Theridion cheimatos Gertsch & Archer, 1942
- species: Theridion cinctipes Banks, 1898
- species: Theridion cowlesae Levi, 1957
- species: Theridion cynicum Gertsch & Mulaik, 1936
- species: Theridion differens Emerton, 1882
- species: Theridion dilutum Levi, 1957
- species: Theridion dividuum Gertsch & Archer, 1942
- species: Theridion dulcineum Gertsch & Archer, 1942
- species: Theridion flavonotatum Becker, 1879
- species: Theridion frondeum Hentz, 1850
- species: Theridion geminipunctum Chamberlin, 1924
- species: Theridion glaucescens Becker, 1879
- species: Theridion goodnightorum Levi, 1957
- species: Theridion hemerobium Simon, 1914
- species: Theridion hidalgo Levi, 1957
- species: Theridion impressum L. Koch, 1881
- species: Theridion intritum (Bishop & Crosby, 1926)
- species: Theridion istokpoga Levi, 1957
- species: Theridion kawea Levi, 1957
- species: Theridion lawrencei Gertsch & Archer, 1942
- species: Theridion leechi Gertsch & Archer, 1942
- species: Theridion llano Levi, 1957
- species: Theridion melanurum Hahn, 1831
- species: Theridion michelbacheri Levi, 1957
- species: Theridion montanum Emerton, 1882
- species: Theridion morulum O. P.-Cambridge, 1898
- species: Theridion murarium Emerton, 1882
- species: Theridion myersi Levi, 1957
- species: Theridion neomexicanum Banks, 1901
- species: Theridion neshamini Levi, 1957
- species: Theridion ohlerti Thorell, 1870
- species: Theridion orlando (Archer, 1950)
- species: Theridion pennsylvanicum Emerton, 1913
- species: Theridion petraeum L. Koch, 1872
- species: Theridion pictipes Keyserling, 1884
- species: Theridion pictum (Walckenaer, 1802)
- species: Theridion positivum Chamberlin, 1924
- species: Theridion punctipes Emerton, 1924
- species: Theridion rabuni Chamberlin & Ivie, 1944
- species: Theridion saanichum Chamberlin & Ivie, 1947
- species: Theridion sardis Chamberlin & Ivie, 1944
- species: Theridion submissum Gertsch & Davis, 1936
- species: Theridion timpanogos Levi, 1957
- species: Theridion transgressum Petrunkevitch, 1911
- species: Theridion varians Hahn, 1833
- genus: Thymoites
- species: Thymoites camano (Levi, 1957)
- species: Thymoites expulsus (Gertsch & Mulaik, 1936)
- species: Thymoites illudens (Gertsch & Mulaik, 1936)
- species: Thymoites maderae (Gertsch & Archer, 1942)
- species: Thymoites marxi (Crosby, 1906)
- species: Thymoites missionensis (Levi, 1957)
- species: Thymoites oleatus (L. Koch, 1879)
- species: Thymoites pallidus (Emerton, 1913)
- species: Thymoites pictipes (Banks, 1904)
- species: Thymoites sarasota (Levi, 1957)
- species: Thymoites sclerotis (Levi, 1957)
- species: Thymoites unimaculatus (Emerton, 1882)
- genus: Tidarren
- genus: Wamba