- family: Nesticidae
- family: Nicodamidae
- family: Theridiidae
- genus: Achaearanea
- species: Achaearanea alacris (Keyserling, 1884)
- species: Achaearanea altiventer (Keyserling, 1884)
- species: Achaearanea dromedariformis (Roewer, 1942)
- species: Achaearanea gigantea (Keyserling, 1884)
- species: Achaearanea globosa (Hentz, 1850)
- species: Achaearanea hirta (Taczanowski, 1873)
- species: Achaearanea migrans (Keyserling, 1884)
- species: Achaearanea nigrovittata (Keyserling, 1884)
- species: Achaearanea pusillana (Roewer, 1942)
- species: Achaearanea taeniata (Keyserling, 1884)
- species: Achaearanea tesselata (Keyserling, 1884)
- species: Achaearanea trapezoidalis (Taczanowski, 1873)
- genus: Anelosimus
- genus: Argyrodes
- genus: Audifia Keyserling, 1884
- genus: Chrysso
- genus: Coleosoma
- genus: Dipoena
- genus: Echinotheridion
- genus: Enoplognatha
- genus: Episinus
- genus: Exalbidion
- genus: Faiditus Keyserling, 1884
- genus: Helvibis Keyserling, 1884
- genus: Keijia
- genus: Kochiura
- genus: Latrodectus
- genus: Neospintharus
- genus: Nesticodes
- genus: Parasteatoda
- genus: Rhomphaea
- genus: Robertus
- genus: Rugathodes
- genus: Spintharus
- genus: Steatoda
- species: Steatoda albomaculata (De Geer, 1778)
- species: Steatoda ancorata (Holmberg, 1876)
- species: Steatoda andina (Keyserling, 1884)
- species: Steatoda bipunctata (Linnaeus, 1758)
- species: Steatoda borealis (Hentz, 1850)
- species: Steatoda erigoniformis (O. P.-Cambridge, 1872)
- species: Steatoda fulva (Keyserling, 1884)
- species: Steatoda grossa (C. L. Koch, 1838)
- species: Steatoda pulchra (Keyserling, 1884)
- species: Steatoda triangulosa (Walckenaer, 1802)
- species: Steatoda variipes (Keyserling, 1884)
- genus: Takayus
- genus: Theridion
- species: Theridion calcynatum Holmberg, 1876
- species: Theridion differens Emerton, 1882
- species: Theridion evexum Keyserling, 1884
- species: Theridion fastosum Keyserling, 1884
- species: Theridion flavonotatum Becker, 1879
- species: Theridion fungosum Keyserling, 1886
- species: Theridion glaucescens Becker, 1879
- species: Theridion longipedatum Roewer, 1942
- species: Theridion minutissimum Keyserling, 1884
- species: Theridion murarium Emerton, 1882
- species: Theridion neomexicanum Banks, 1901
- species: Theridion nigroannulatum Keyserling, 1884
- species: Theridion parvum Keyserling, 1884
- species: Theridion pictipes Keyserling, 1884
- species: Theridion pictum (Walckenaer, 1802)
- species: Theridion rubiginosum Keyserling, 1884
- species: Theridion striatum Keyserling, 1884
- species: Theridion torosum Keyserling, 1884
- species: Theridion uber Keyserling, 1884
- species: Theridion volubile Keyserling, 1884
- species: Theridion zonarium Keyserling, 1884
- genus: Theridula
- genus: Thwaitesia
- genus: Thymoites Keyserling, 1884
- genus: Tidarren
- family: Theridiosomatidae