| Theridion abruptum Eugène Simon, 1884 | White meadowbeauty |
| Theridion acanthopodum Gao & Li, 2014 | |
| Theridion accoense Gershom Levy, 1985 | |
| Theridion acrobeles (Thorell, 1895) | ⇒ Coleosoma blandum O. P.-Cambridge, 1882 |
| Theridion acuminatum Wider, 1834 | |
| Theridion acutitarse Eugène Simon, 1900 | |
| Theridion adjacens Octavius Pic..., 1896 | Cobweb spiders |
| Theridion adrianopoli Drensky, 1915 | |
| Theridion aeolium Herbert Walt..., 1963 | |
| Theridion affine (Strand, 1928) | ⇒ Ohlertidion ohlerti Tord Tamerla..., 1870 |
| Theridion agrarium Herbert Walt..., 1963 | |
| Theridion agreste Hercule Nicolet, 1849 | Lance-leaf stonecrop |
| Theridion agrifoliae Herbert Walt..., 1957 | |
| Theridion akme Herbert Walt..., 1959 | Cobweb spiders |
| Theridion akron Herbert Walt..., 1959 | Cobweb spiders |
| Theridion alacre Keyserling, 1884 | |
| Theridion albidorsum Embrik Strand, 1909 | |
| Theridion albidum (Richard C. B..., 1895) | ⇒ Theridion berlandi Carl Friedri..., 1942 |
| Theridion albioculum Chuandian Zhu, 1998 | |
| Theridion albipes Ludwig Carl ..., 1878 | |
| Theridion albocinctum Arthur T. Ur..., 1892 | |
| Theridion albodecoratum William Jose..., 1916 | |
| Theridion albolineatum Hercule Nicolet, 1849 | Lance-leaf stonecrop |
| Theridion albolineolatum Lodovico di ..., 1940 | |
| Theridion albomaculosum Octavius Pic..., 1869 | |
| Theridion albonotatum (Taczanowski, 1872) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion albopictum Tord Tamerla..., 1898 | |
| Theridion albostriatum Ludwig Carl ..., 1867 | |
| Theridion albulum Octavius Pic..., 1898 | Cobweb spiders |
| Theridion aleipata Marples, 1955 | |
| Theridion altum (Herbert Walt..., 1963) | ⇒ Theridion soaresi Herbert Walt..., 1963 |
| Theridion alutaceum ♰ C. L. Koch, 1854 | |
| Theridion alveolus Walckenaer, 1805 | |
| Theridion amarga Herbert Walt..., 1967 | |
| Theridion amatitlan Herbert Walt..., 1963 | Cobweb spiders |
| Theridion ambiguum (Hercule Nicolet, 1849) | ⇒ Theridion kochi Carl Friedri..., 1942 |
| Theridion ampascachi Cândido Firm..., 1941 | |
| Theridion ampliatum Arthur T. Ur..., 1892 | |
| Theridion angulithorax (Bösenberg &..., 1906) | ⇒ Parasteatoda angulithorax Bösenberg & ..., 1906 |
| Theridion angusticeps Lodovico di ..., 1949 | |
| Theridion angustifrons Lodovico di ..., 1934 | |
| Theridion annulipes ♰ (O. Heer, 1865) | ⇒ Theridion ceylonicus Dunlop & Jekel, 2009 |
| Theridion anson Herbert Walt..., 1967 | |
| Theridion anticum Wider, 1834 | |
| Theridion antillanum Eugène Simon, 1894 | |
| Theridion antonii | |
| Theridion antron (Herbert Walt..., 1963) | ⇒ Theridion filum Herbert Walt..., 1963 |
| Theridion apiculatum Carl Friedri..., 1942 | |
| Theridion aporum Herbert Walt..., 1963 | |
| Theridion apostoli Cândido Firm..., 1945 | |
| Theridion apulco Herbert Walt..., 1959 | |
| Theridion aragua Herbert Walt..., 1963 | |
| Theridion archeri Herbert Walt..., 1959 | |
| Theridion argentatulum Carl Friedri..., 1942 | |
| Theridion argyrodiforme | |
| Theridion ariel Bellvert & A..., 2021 | |
| Theridion arizonense Herbert Walt..., 1957 | |
| Theridion arsia Zamani & Mar..., 2021 | |
| Theridion artum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion aruanum Embrik Strand, 1911 | |
| Theridion arushae Lodovico di ..., 1947 | |
| Theridion asbolodes William Jose..., 1917 | |
| Theridion asopi Vanuytven, 2014 | |
| Theridion aspersum | |
| Theridion astrigerum Tord Tamerla..., 1895 | |
| Theridion atalus Chang, 2004 | |
| Theridion atratum Tord Tamerla..., 1877 | Sebastopol meadowfoam |
| Theridion attritum (Eugène Simon, 1908) | ⇒ Kochiura attrita Hercule Nicolet, 1849 |
| Theridion auberti Eugène Simon, 1904 | |
| Theridion aulos Herbert Walt..., 1963 | |
| Theridion aurantius Emerton, 1915 | |
| Theridion auratum Blackwall, 1864 | |
| Theridion australe Richard C. B..., 1899 | |
| Theridion australis | |
| Theridion baccula Tord Tamerla..., 1887 | |
| Theridion bajulans (L. Koch, 1875) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion baltasarense Herbert Walt..., 1963 | |
| Theridion banksi Lucien Berland, 1920 | |
| Theridion barbarae Herbert Walt..., 1959 | |
| Theridion beebei Herbert Walt..., 1963 | |
| Theridion bellatulum Herbert Walt..., 1963 | |
| Theridion bellicosum (Simon, 1873) | ⇒ Runcinia grammica Carl Ludwig ..., 1837 |
| Theridion bellicosus Simon, 1873 | |
| Theridion bengalense Sen, Saha & ..., 2011 | |
| Theridion bengalensis Sen, Saha & ..., 2011 | |
| Theridion bentificum | |
| Theridion berendti ♰ C. L. Koch, 1854 | |
| Theridion bergi Herbert Walt..., 1963 | |
| Theridion berkeleyi (Emerton, 1924) | ⇒ Theridion hemerobium Eugène Simon, 1914 |
| Theridion berlandi Carl Friedri..., 1942 | |
| Theridion bernardi Lecigne, 2017 | |
| Theridion betteni (Wiehle, 1960) | ⇒ Theridion asopi Vanuytven, 2014 |
| Theridion bicolor Hahn, 1833 | |
| Theridion bicorne (Wider, 1834) | ⇒ Diplocephalus cristatus Blackwall, 1833 |
| Theridion bicruciatum Carl Friedri..., 1961 | |
| Theridion bidepressum Chang-Min Yi..., 2005 | |
| Theridion biezankoi Herbert Walt..., 1963 | |
| Theridion biforaminum Gao & Zhu, 1993 | |
| Theridion bifoveolatum Denis, 1944 | |
| Theridion bimaculatum (Linnaeus, 1767) | ⇒ Neottiura bimaculatum Linnaeus, 1767 |
| Theridion biolleyi Richard C. B..., 1909 | Cobweb spiders |
| Theridion biseriatum Tord Tamerla..., 1890 | Sand bee |
| Theridion bisignatum Mello-Leitao, 1945 | |
| Theridion bitakum Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion bituberculatum Wider, 1834 | |
| Theridion blackwalli (Octavius Pic..., 1871) | ⇒ Sardinidion blackwalli Octavius Pic..., 1871 |
| Theridion blaisei Eugène Simon, 1909 | |
| Theridion blandum (Simon, 1894) | ⇒ Wamba crispulus Eugène Simon, 1895 |
| Theridion boesenbergi Embrik Strand, 1904 | |
| Theridion bogotense | |
| Theridion bolivari Herbert Walt..., 1959 | |
| Theridion bolum Herbert Walt..., 1963 | |
| Theridion bomae Joachim Schmidt, 1957 | |
| Theridion borbonicum (Vinson, 1863) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion bosniense Wunderlich, 2011 | |
| Theridion botanicum Herbert Walt..., 1963 | |
| Theridion brachypus Tord Tamerla..., 1887 | |
| Theridion bradyanum Embrik Strand, 1907 | Carpenter bees |
| Theridion brunellii Lodovico di ..., 1940 | |
| Theridion brunneonigrum Lodovico di ..., 1949 | |
| Theridion bryantae Carl Friedri..., 1951 | San Diego bird's-foot trefoil |
| Theridion bucklandi ♰ T. Thorell, 1870 | |
| Theridion buitenzorgi (Strand, 1907) | ⇒ Chrysso spiniventris O. P.-Cambridge, 1869 |
| Theridion bullatum Albert Tullgren, 1910 | |
| Theridion buxtoni Lucien Berland, 1929 | |
| Theridion cairoense Wunderlich, 2011 | |
| Theridion calcynatum Holmberg, 1876 | |
| Theridion caliban Bellvert & A..., 2021 | |
| Theridion californicum Richard C. B..., 1904 | |
| Theridion caliginosum Brian John M..., 1955 | |
| Theridion cameronense Herbert Walt..., 1957 | |
| Theridion campestratum Eugène Simon, 1900 | |
| Theridion candefactum Walckenaer, 1842 | |
| Theridion caplandense Embrik Strand, 1907 | Carpenter bees |
| Theridion carinatum Chang-Min Yi..., 2005 | |
| Theridion carpathium Paolo Marcel..., 1984 | |
| Theridion cassinicola Eugène Simon, 1907 | |
| Theridion castaneum Pelegrin Fra..., 1931 | |
| Theridion catharina Brian John M..., 1955 | |
| Theridion cavipalpe Frederick Oc..., 1902 | Cobweb spiders |
| Theridion cavipalpum F.O.Pickard-..., 1902 | |
| Theridion cavipalpus F. O. Pickar..., 1902 | |
| Theridion cazieri Herbert Walt..., 1959 | |
| Theridion centrum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion ceres Bellvert & A..., 2021 | |
| Theridion ceylonicum Dunlop & Jekel, 2009 | |
| Theridion ceylonicus Dunlop & Jekel, 2009 | |
| Theridion chacoense Herbert Walt..., 1963 | |
| Theridion chakinuense Jörg Wunderl..., 1995 | |
| Theridion chamberlini Lodovico di ..., 1949 | |
| Theridion charitonowi Lodovico di ..., 1949 | |
| Theridion charlati Dierkens, 2016 | |
| Theridion cheimatos Willis J. Ge..., 1942 | |
| Theridion cheliferum Wider, 1834 | |
| Theridion cheni Chuandian Zhu, 1998 | |
| Theridion chenzhangfui Lin & Li, 2024 | |
| Theridion chevalieri (Berland, 1936) | ⇒ Tidarren cuneolatum Albert Tullgren, 1910 |
| Theridion chihuahua Herbert Walt..., 1959 | |
| Theridion chiriqui Herbert Walt..., 1959 | Cobweb spiders |
| Theridion chonetum Chuandian Zhu, 1998 | |
| Theridion choroni Herbert Walt..., 1963 | |
| Theridion cinctipes Richard C. B..., 1898 | |
| Theridion cinereum (Tord Tamerla..., 1875) | ⇒ Platnickina alabamensis Willis J. Ge..., 1942 |
| Theridion circuitum Gao & Li, 2014 | |
| Theridion circumtextum Eugène Simon, 1907 | |
| Theridion climacode Tord Tamerla..., 1898 | |
| Theridion clivalum Chuandian Zhu, 1998 | |
| Theridion cloxum Michael J. R..., 1983 | Jawla paste shrimp |
| Theridion clypeatellum Albert Tullgren, 1910 | |
| Theridion cochise Herbert Walt..., 1963 | |
| Theridion cochrum Herbert Walt..., 1963 | |
| Theridion cocosense Embrik Strand, 1906 | Cobweb spiders |
| Theridion coenosum Tord Tamerla..., 1887 | |
| Theridion cohni Herbert Walt..., 1963 | |
| Theridion coldeniae Léon Baert &..., 1986 | |
| Theridion comatum Wider, 1834 | |
| Theridion comstocki Lucien Berland, 1920 | |
| Theridion confusum Octavius Pic..., 1885 | |
| Theridion conigerum (Simon, 1914) | ⇒ Achaeridion conigerum Eugène Simon, 1914 |
| Theridion contrarium ♰ J. Wunderlich, 1988 | |
| Theridion contreras Herbert Walt..., 1959 | |
| Theridion conurum (Thorell, 1895) | ⇒ Coleosoma blandum O. P.-Cambridge, 1882 |
| Theridion convexellum Carl Friedri..., 1942 | |
| Theridion convexisternum Lodovico di ..., 1949 | |
| Theridion corcyraeum Paolo Marcel..., 1984 | |
| Theridion cornutum (Drensky, 1917) | ⇒ Phylloneta impressa Ludwig Carl ..., 1881 |
| Theridion costaricaense Herbert Walt..., 1963 | Cobweb spiders |
| Theridion costaricense Levi, 1963 | |
| Theridion cowlesae Herbert Walt..., 1957 | |
| Theridion coyoacan Herbert Walt..., 1959 | |
| Theridion crassipalpum ♰ L. Berland, 1939 | |
| Theridion cretaensis Wunderlich, 1995 | |
| Theridion crinigerum (Simon, 1881) | ⇒ Anatolidion gentile Eugène Simon, 1881 |
| Theridion cristatum Wider, 1834 | |
| Theridion cristatus Wider, 1834 | |
| Theridion cruciferum Arthur T. Ur..., 1886 | |
| Theridion crucum Herbert Walt..., 1959 | |
| Theridion cuspulatum Joachim Schm..., 1998 | |
| Theridion cuyutlan Herbert Walt..., 1963 | |
| Theridion cygneum Gao & Li, 2014 | |
| Theridion cynicum Willis J. Ge..., 1936 | |
| Theridion cyprusense Wunderlich, 2011 | |
| Theridion dafnense Levy & Amitai, 1982 | |
| Theridion darolense Embrik Strand, 1906 | |
| Theridion davisorum Herbert Walt..., 1959 | |
| Theridion dayongense Chuandian Zhu, 1998 | |
| Theridion decemmaculatum Tord Tamerla..., 1890 | Sand bee |
| Theridion decemperlatum Eugène Simon, 1889 | Fine-sculpted cerith |
| Theridion decoloratum Keyserling, 1886 | |
| Theridion decoratum (L. Koch, 1867) | ⇒ Parasteatoda decorata Ludwig Carl ..., 1867 |
| Theridion dedux Octavius Pic..., 1904 | |
| Theridion delicatum (Octavius Pic..., 1904) | ⇒ Kochiura aulica Carl Ludwig ..., 1838 |
| Theridion denisi (Wunderlich, 1987) | ⇒ Theridion positivum Ralph Vary C..., 1924 |
| Theridion dentatum (Wider, 1834) | ⇒ Gnathonarium dentatum Wider, 1834 |
| Theridion dentipalpe Wider, 1834 | |
| Theridion derhami Eugène Simon, 1895 | |
| Theridion desertum A. V. Ponomarev, 2008 | |
| Theridion detersum ♰ C. L. Koch, 1854 | |
| Theridion dexteri Petrunkevitch, 1930 | |
| Theridion diadematum Pater Chrysa..., 1963 | |
| Theridion dianiphum William Jose..., 1916 | |
| Theridion differens (James Henry ..., 1882) | ⇒ Theridion glaucescens Lawrence Becker, 1879 |
| Theridion dilucidum Eugène Simon, 1897 | Cobweb spiders |
| Theridion dilutum Herbert Walt..., 1957 | |
| Theridion diurnum Vinson, 1863 | |
| Theridion dividuum (Willis J. Ge..., 1942) | ⇒ Thymoites expulsus Willis J. Ge..., 1936 |
| Theridion dominica Herbert Walt..., 1963 | |
| Theridion dreisbachi Herbert Walt..., 1959 | |
| Theridion dubium Bradley, 1877 | |
| Theridion dukouense Chuandian Zhu, 1998 | |
| Theridion dulcineum Willis J. Ge..., 1942 | |
| Theridion durbanicum George Newbo..., 1947 | |
| Theridion dysderoides (Wider, 1834) | ⇒ Walckenaeria dysderoides Wider, 1834 |
| Theridion echinatum Gao & Li, 2014 | |
| Theridion ecuadorense Herbert Walt..., 1963 | |
| Theridion egyptium (Fawzy & El E..., 2002) | ⇒ Theridion jordanense Levy & Amitai, 1982 |
| Theridion electum Octavius Pic..., 1896 | |
| Theridion elegans (Saito, 1933) | ⇒ Theridion elegantissimum Carl Friedri..., 1942 |
| Theridion elegantissimum Carl Friedri..., 1942 | |
| Theridion elegantissium Roewer, 1942 | |
| Theridion elevatum (Tord Tamerla..., 1881) | ⇒ Tidarren haemorrhoidale Philip Bertkau, 1880 |
| Theridion elimatum (Ludwig Carl ..., 1882) | ⇒ Enoplognatha diversa John Blackwall, 1859 |
| Theridion elisabethae Carl Friedri..., 1951 | San Diego bird's-foot trefoil |
| Theridion elli Sedgwick, 1973 | |
| Theridion ellicottense Dobyns & Bond, 1996 | |
| Theridion elongatum Wider, 1834 | |
| Theridion emertoni Lucien Berland, 1920 | |
| Theridion epiense Lucien Berland, 1938 | |
| Theridion epiensis Berland, 1938 | |
| Theridion erectoides ♰ J. Wunderlich, 1988 | |
| Theridion erectum ♰ J. Wunderlich, 1988 | |
| Theridion eremum Herbert Walt..., 1963 | |
| Theridion erigoniforme (O. P.-Cambridge, 1872) | ⇒ Steatoda erigoniformis O. P.-Cambridge, 1872 |
| Theridion ethicum Keyserling, 1884 | |
| Theridion eugeni Carl Friedri..., 1942 | |
| Theridion evexum (Eugen von Ke..., 1884) | ⇒ Theridion omiltemi Herbert Walt..., 1959 |
| Theridion excavatum Frederick Oc..., 1902 | Cobweb spiders |
| Theridion eximium Keyserling, 1884 | |
| Theridion exlinae Levi, 1963 | |
| Theridion exlineae Herbert Walt..., 1963 | |
| Theridion expallidatum Octavius Pic..., 1885 | |
| Theridion experimentum | |
| Theridion extrilidium Keyserling, 1890 | |
| Theridion extrilidum (Keyserling, 1890) | ⇒ Cryptachaea veruculata Urquhart, 1886 |
| Theridion falcatum Gao & Li, 2014 | |
| Theridion familiare Octavius Pic..., 1871 | |
| Theridion fastosum Eugen von Ke..., 1884 | Guinea ant |
| Theridion fatuhivaense Lucien Berland, 1933 | |
| Theridion fatuhivaensis (Berland, 1933) | ⇒ Theridion fatuhivaense Lucien Berland, 1933 |
| Theridion femorale Tord Tamerla..., 1881 | Golden cricket wasp |
| Theridion femoratissimum Lodovico di ..., 1949 | |
| Theridion ferdinand Bellvert & A..., 2021 | |
| Theridion fernandense Eugène Simon, 1907 | |
| Theridion ferrum-equinum (Bösenberg, ..., 1906) | ⇒ Campanicola ferrumequina Bösenberg & ..., 1906 |
| Theridion filum Herbert Walt..., 1963 | |
| Theridion flabelliferum Arthur T. Ur..., 1887 | |
| Theridion flavo-aurantiacum (Simon, 1880) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion flavonotatum Lawrence Becker, 1879 | |
| Theridion flavoornatum Tord Tamerla..., 1898 | |
| Theridion formosum (Westring, 1851) | ⇒ Parasteatoda lunata Carl Alexand..., 1757 |
| Theridion fornicatum Eugène Simon, 1884 | White meadowbeauty |
| Theridion frio Herbert Walt..., 1959 | |
| Theridion frizzellorum Herbert Walt..., 1963 | |
| Theridion frondeum Nicholas Mar..., 1850 | Eastern Long-Legged Cobweaver |
| Theridion fruticum (Eugène Simon, 1890) | ⇒ Theridion macropora Guo Tang, Ch..., 2006 |
| Theridion fungosum (Eugen von Ke..., 1886) | ⇒ Exalbidion fungosum Keyserling, 1886 |
| Theridion furfuraceum Eugène Simon, 1914 | |
| Theridion fuscodecoratum William Jose..., 1916 | |
| Theridion fuscomaculatum William Jose..., 1916 | |
| Theridion fuscum (Pelegrin Fra..., 1930) | ⇒ Theonoe formivora Charles Atha..., 1842 |
| Theridion gabardi Eugène Simon, 1895 | |
| Theridion galerum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion gekkonicum Levy & Amitai, 1982 | |
| Theridion geminipunctum Ralph Vary C..., 1924 | |
| Theridion genistae Eugène Simon, 1873 | |
| Theridion genistae turanicum (Charitonov, 1946) | ⇒ Theridion turanicum Charitonov, 1946 |
| Theridion gentile (Simon, 1881) | ⇒ Anatolidion gentile Eugène Simon, 1881 |
| Theridion gertschi Herbert Walt..., 1959 | |
| Theridion gibbum William Jose..., 1916 | |
| Theridion giganteum | |
| Theridion gigantipes (Eugen von Ke..., 1890) | ⇒ Cryptachaea gigantipes Keyserling, 1890 |
| Theridion giraulti William Jose..., 1916 | |
| Theridion glaciale Lodovico di ..., 1934 | |
| Theridion glaucescens Lawrence Becker, 1879 | |
| Theridion glaucinum Eugène Simon, 1881 | |
| Theridion globosus Presl, 1822 | |
| Theridion globulus ♰ O. Heer, 1865 | |
| Theridion goodnightorum Herbert Walt..., 1957 | |
| Theridion gracile | |
| Theridion gracilipes Arthur T. Ur..., 1889 | |
| Theridion grallator Simon, 1900 | Happy face spider |
| Theridion gramineum Chuandian Zhu, 1998 | |
| Theridion grammatophorum Eugène Simon, 1909 | |
| Theridion grancanariense Jörg Wunderl..., 1987 | |
| Theridion grandiosum Herbert Walt..., 1963 | |
| Theridion grecia Herbert Walt..., 1959 | Cobweb spiders |
| Theridion guttatum Wider, 1834 | |
| Theridion gyirongense Hu & S. Q. Li, 1987 | |
| Theridion hainanense Zhu, 1998 | |
| Theridion hainenense Chuandian Zhu, 1998 | |
| Theridion haleakalense Eugène Simon, 1900 | |
| Theridion hannoniae J. Denis, 1944 | |
| Theridion harmsi Wunderlich, 2011 | |
| Theridion hartmeyeri Eugène Simon, 1908 | |
| Theridion hassleri Herbert Walt..., 1963 | |
| Theridion hebridisianum Lucien Berland, 1938 | |
| Theridion helena Wunderlich, 2011 | |
| Theridion helophorum Tord Tamerla..., 1895 | |
| Theridion hemerobium Eugène Simon, 1914 | |
| Theridion hermonense Gershom Levy, 1991 | |
| Theridion hewitti Lodovico di ..., 1949 | |
| Theridion hidalgo Herbert Walt..., 1957 | |
| Theridion hierichonticum Levy & Amitai, 1982 | |
| Theridion hilgendorfi (Karsch, 1879) | ⇒ Hypsosinga sanguinea C. L. Koch, 1844 |
| Theridion hirsutum O. Pickard-C..., 1898 | |
| Theridion hirtum ♰ C. L. Koch, 1854 | |
| Theridion hispidum Octavius Pic..., 1898 | |
| Theridion histrionicum Tord Tamerla..., 1875 | |
| Theridion hondurense Herbert Walt..., 1959 | Cobweb spiders |
| Theridion hopkinsi Lucien Berland, 1929 | |
| Theridion hotanense Zhu & Zhou, 1993 | |
| Theridion huanuco Herbert Walt..., 1963 | |
| Theridion hufengense Tang, Yin & ..., 2005 | |
| Theridion hufengensis (Guo Tang, Ch..., 2005) | ⇒ Theridion hufengense Tang, Yin & ..., 2005 |
| Theridion hui Chuandian Zhu, 1998 | |
| Theridion humboldti Herbert Walt..., 1967 | |
| Theridion hummeli Ehrenfried S..., 1936 | |
| Theridion hupingense Yin, 2012 | |
| Theridion idiotypum William Jose..., 1917 | |
| Theridion ignotum Keyserling, 1884 | |
| Theridion illecebrosum Eugène Simon, 1886 | |
| Theridion impegrum Eugen von Ke..., 1886 | |
| Theridion impressithorax Eugène Simon, 1895 | |
| Theridion impressum (L. Koch, 1881) | ⇒ Phylloneta impressa Ludwig Carl ..., 1881 |
| Theridion incanescens Eugène Simon, 1890 | |
| Theridion incertissimum Lodovico di ..., 1954 | |
| Theridion incertum Octavius Pic..., 1885 | |
| Theridion incomtum Octavius Pic..., 1896 | Cobweb spiders |
| Theridion inconspicuum Tord Tamerla..., 1898 | |
| Theridion indicis | |
| Theridion indicum Benoy Krishn..., 1977 | |
| Theridion innoccum Thorell, 1875 | |
| Theridion innocuum Tord Tamerla..., 1875 | |
| Theridion inornatum (O. P.-Cambridge, 1861) | ⇒ Phycosoma inornatum Octavius Pic..., 1861 |
| Theridion inquinatum Tord Tamerla..., 1878 | Carpenter bees |
| Theridion inquinatum continentale Strand, 1907 | |
| Theridion inquinatum inquinatum Thorell, 1878 | |
| Theridion insignitarse Eugène Simon, 1907 | |
| Theridion instabile (Jackson, 1914) | ⇒ Rugathodes instabilis Octavius Pic..., 1871 |
| Theridion instabilis O. P.-Cambridge, 1871 | |
| Theridion intritum Bishop & Crosby, 1926 | |
| Theridion inversum ♰ J. Wunderlich, 1988 | |
| Theridion iramon Herbert Walt..., 1963 | |
| Theridion irrugatum Gao & Li, 2014 | |
| Theridion ischagosum Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion isorium Herbert Walt..., 1963 | |
| Theridion istokpoga Herbert Walt..., 1957 | Cobweb spiders |
| Theridion italiense Jörg Wunderl..., 1995 | |
| Theridion japonicum (Bösenberg &..., 1906) | ⇒ Parasteatoda japonica Bösenberg & ..., 1906 |
| Theridion jordanense Levy & Amitai, 1982 | |
| Theridion juno Bellvert & A..., 2021 | |
| Theridion kambalum Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion karamayense Chuandian Zhu, 1998 | |
| Theridion kauaiense Eugène Simon, 1900 | |
| Theridion kawea Herbert Walt..., 1957 | |
| Theridion kentuckyense Keyserling, 1884 | |
| Theridion kentuckyensis | |
| Theridion kibonotense Albert Tullgren, 1910 | |
| Theridion kiliani Müller & Hei..., 1990 | |
| Theridion kobrooricum Embrik Strand, 1911 | |
| Theridion kochi Carl Friedri..., 1942 | |
| Theridion kollari Carl Ludwig ..., 1852 | |
| Theridion kompirense (Bösenberg &..., 1906) | ⇒ Parasteatoda kompirensis Bösenberg & ..., 1906 |
| Theridion kraepelini Eugène Simon, 1905 | |
| Theridion kraussi Brian John M..., 1957 | |
| Theridion lacticolor Lucien Berland, 1920 | |
| Theridion laevigatum John Blackwall, 1870 | |
| Theridion lago Herbert Walt..., 1963 | |
| Theridion lamperti Embrik Strand, 1906 | |
| Theridion lanceatum Zhang & Zhu, 2007 | |
| Theridion lapidicola Wladislaus K..., 1887 | |
| Theridion latisternum Lodovico di ..., 1934 | |
| Theridion lawrencei Willis J. Ge..., 1942 | |
| Theridion leechi Willis J. Ge..., 1942 | |
| Theridion leguiai Ralph Vary C..., 1916 | |
| Theridion lenzianum Embrik Strand, 1907 | Carpenter bees |
| Theridion leones Herbert Walt..., 1959 | |
| Theridion leucophaeum Eugène Simon, 1905 | |
| Theridion leve John Blackwall, 1877 | |
| Theridion leviorum Willis J. Ge..., 1976 | |
| Theridion liaoyuanense Zhu & Yu, 1982 | |
| Theridion lichenis Wider, 1834 | |
| Theridion liliputanum | |
| Theridion limatum Albert Tullgren, 1910 | |
| Theridion limitatum Ludwig Carl ..., 1872 | |
| Theridion linaresense Herbert Walt..., 1963 | |
| Theridion lineatum Clerck, 1757 | |
| Theridion linzhiense Hsen Hsu Hu, 2001 | |
| Theridion llano Herbert Walt..., 1957 | |
| Theridion logan Levi & Patrick, 2013 | |
| Theridion lomirae Carl Friedri..., 1938 | |
| Theridion longicrure Brian John M..., 1956 | |
| Theridion longiductum Liu & Peng, 2012 | |
| Theridion longihirsutum Embrik Strand, 1907 | Carpenter bees |
| Theridion longioembolia Liu & Peng, 2012 | |
| Theridion longipalpe Wider, 1834 | |
| Theridion longipalpum Chuandian Zhu, 1998 | |
| Theridion longipedatum Carl Friedri..., 1942 | |
| Theridion longipes (Hasselt, 1882) | ⇒ Theridion longipedatum Carl Friedri..., 1942 |
| Theridion longipili Seo, 2004 | |
| Theridion ludekingi Tord Tamerla..., 1890 | Sand bee |
| Theridion ludius Eugène Simon, 1880 | |
| Theridion lumabani Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion lunatum (C. L. Koch, 1841) | ⇒ Parasteatoda lunata Carl Alexand..., 1757 |
| Theridion luteipes (O. P.-Cambridge, 1869) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion luteitarse Joachim Schm..., 1995 | |
| Theridion luteolum (Blackwall, 1859) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion lutipes O. Pickard-C..., 1869 | |
| Theridion macei Eugène Simon, 1895 | |
| Theridion machu Herbert Walt..., 1963 | |
| Theridion macropora Guo Tang, Ch..., 2006 | |
| Theridion macuchi Herbert Walt..., 1963 | |
| Theridion maculiferum Carl Friedri..., 1942 | |
| Theridion maculipes ♰ (O. Heer, 1865) | ⇒ Theridion elisabethae Carl Friedri..., 1951 |
| Theridion magdalenense Müller & Hei..., 1990 | |
| Theridion maindroni Eugène Simon, 1905 | |
| Theridion makotoi Hajime Yoshida, 2009 | Steel-blue cricket hunter |
| Theridion malagaense Wunderlich, 2011 | |
| Theridion manjithar Benoy Krishn..., 1970 | |
| Theridion manonoense Brian John M..., 1955 | |
| Theridion maranum Herbert Walt..., 1963 | |
| Theridion marginellum Wider, 1834 | |
| Theridion maron Herbert Walt..., 1963 | |
| Theridion martini Herbert Walt..., 1959 | |
| Theridion marxii | |
| Theridion mataafa Brian John M..., 1955 | |
| Theridion mauense Lodovico di ..., 1949 | |
| Theridion mauiense Eugène Simon, 1900 | |
| Theridion mehlum Michael J. R..., 1983 | Jawla paste shrimp |
| Theridion melanoplax Joachim Schm..., 1996 | |
| Theridion melanoprorum Tord Tamerla..., 1895 | |
| Theridion melanoprorum melanoprorum Thorell, 1895 | |
| Theridion melanoprorum orientale Simon, 1909 | |
| Theridion melanosternon (Cândido Firm..., 1947) | ⇒ Theridion bisignatum Mello-Leitao, 1945 |
| Theridion melanostictum Octavius Pic..., 1876 | Cobweb weaver |
| Theridion melanurum Carl Wilhelm..., 1831 | Balsam fir |
| Theridion melinum Eugène Simon, 1900 | |
| Theridion mendozae Lucien Berland, 1933 | |
| Theridion meneghettii Lodovico di ..., 1949 | |
| Theridion metabolum Ralph Vary C..., 1936 | Cobweb spiders |
| Theridion metator Eugène Simon, 1907 | |
| Theridion meum (Bösenberg, ..., 1906) | ⇒ Campanicola ferrumequina Bösenberg & ..., 1906 |
| Theridion michelbacheri Herbert Walt..., 1957 | |
| Theridion micheneri Herbert Walt..., 1963 | Cobweb spiders |
| Theridion miniaceum Doleschall, 1857 | |
| Theridion minimum Wider, 1834 | |
| Theridion minutissimum Eugen von Ke..., 1884 | Cobweb spiders |
| Theridion minutulum Tord Tamerla..., 1895 | |
| Theridion mirabilis (Zhu, Zhang & Xu, 1991) | ⇒ Paidiscura subpallens Bösenberg & ..., 1906 |
| Theridion miranda Bellvert & A..., 2021 | |
| Theridion miserum Tord Tamerla..., 1898 | |
| Theridion modestum (Eugène Simon, 1894) | ⇒ Sphecozone modesta Hercule Nicolet, 1849 |
| Theridion modonatum Wunderlich, 2023 | |
| Theridion molliculum Tord Tamerla..., 1899 | Black carpenter ant |
| Theridion mollissimum Ludwig Carl ..., 1872 | |
| Theridion montanum (Emerton, 1882) | ⇒ Canalidion montanum James Henry ..., 1882 |
| Theridion monzonense Herbert Walt..., 1963 | |
| Theridion mortuale Eugène Simon, 1908 | |
| Theridion morulum (Octavius Pic..., 1898) | ⇒ Theridion eugeni Carl Friedri..., 1942 |
| Theridion mucidum Gao & Li, 2014 | |
| Theridion mundulum L.Koch, 1872 | |
| Theridion munifex O. Pickard-C..., 1896 | |
| Theridion murarium James Henry ..., 1882 | |
| Theridion musivivoides Joachim Schm..., 1995 | |
| Theridion musivivum (Joachim Schmidt, 1956) | ⇒ Theridion musivivoides Joachim Schm..., 1995 |
| Theridion musivum (Eugène Simon, 1873) | ⇒ Ruborridion musivum Simon, 1873 |
| Theridion myersi Herbert Walt..., 1957 | |
| Theridion mystaceum Koch, 1870 | |
| Theridion mysteriosum Joachim Schmidt, 1971 | |
| Theridion nadleri Herbert Walt..., 1959 | |
| Theridion nagorum Michael J. R..., 1983 | Jawla paste shrimp |
| Theridion naneum (Roberts, 1983) | ⇒ Nanume naneum Michael J. R..., 1983 |
| Theridion nasinotum Lodovico di ..., 1949 | |
| Theridion nasutum Jörg Wunderl..., 1995 | |
| Theridion nebulosum Hahn, 1831 | |
| Theridion necijaense Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion negebense Levy & Amitai, 1982 | |
| Theridion neglectum Wiehle, 1952 | |
| Theridion neomexicanum Richard C. B..., 1901 | |
| Theridion neshamini Herbert Walt..., 1957 | |
| Theridion nesticum (Herbert Walt..., 1963) | ⇒ Theridion teresae Herbert Walt..., 1963 |
| Theridion nigriceps Eugen von Ke..., 1891 | |
| Theridion nigroannulatum Eugen von Ke..., 1884 | Guinea ant |
| Theridion nigromaculatum Keyserling, 1884 | |
| Theridion nigroplagiatum Lodovico di ..., 1949 | |
| Theridion nigropunctatum (Lucas, 1846) | ⇒ Platnickina nigropunctata Hippolyte Lucas, 1846 |
| Theridion nigropunctulatum Tord Tamerla..., 1898 | |
| Theridion nigrosacculatum Albert Tullgren, 1910 | |
| Theridion nigrovariegatum (Simon, 1873) | ⇒ Heterotheridion nigrovariegatum Eugène Simon, 1873 |
| Theridion nilgherinum Eugène Simon, 1905 | |
| Theridion niphocosmum William Jose..., 1916 | |
| Theridion niveopunctatum Tord Tamerla..., 1898 | |
| Theridion niveum Octavius Pic..., 1898 | |
| Theridion nivosum William Jose..., 1916 | |
| Theridion nodiferum Eugène Simon, 1895 | |
| Theridion nojimai Hajime Yoshida, 1999 | |
| Theridion notabile Keyserling, 1891 | |
| Theridion notatum Linnaeus, 1758 | |
| Theridion nudum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion oatesi Tord Tamerla..., 1895 | |
| Theridion oblongum Presl, 1822 | |
| Theridion obnubilum | |
| Theridion obscuratum Chuandian Zhu, 1998 | |
| Theridion ochreolum Levy & Amitai, 1982 | |
| Theridion octoferum Embrik Strand, 1909 | |
| Theridion octomaculatum (Bösenberg &..., 1906) | ⇒ Chrysso octomaculata Friedrich Wi..., 1906 |
| Theridion odisha Prasad, Cale..., 2019 | |
| Theridion odoratum Chuandian Zhu, 1998 | |
| Theridion ohlerti (Thorell, 1870) | ⇒ Ohlertidion ohlerti Tord Tamerla..., 1870 |
| Theridion ohlerti lundbecki (Sørensen, 1898) | ⇒ Ohlertidion lundbecki William Sør..., 1898 |
| Theridion ohlertii (Thorell, 1870) | ⇒ Ohlertidion ohlerti Tord Tamerla..., 1870 |
| Theridion olaup (Herbert Walt..., 1963) | ⇒ Kochiura olaup Levi, 1963 |
| Theridion omiltemi Herbert Walt..., 1959 | Cobweb spiders |
| Theridion onticolum Herbert Walt..., 1963 | |
| Theridion opertaneum Scudder, 1890 | |
| Theridion opolon Herbert Walt..., 1963 | |
| Theridion opuntia Herbert Walt..., 1963 | |
| Theridion orgea Herbert Walt..., 1967 | |
| Theridion orlando Archer, 1950 | |
| Theridion orotavense Schmidt, 1968 | |
| Theridion orotavensis Schmidt, 1968 | |
| Theridion osprum Herbert Walt..., 1963 | |
| Theridion oswaldocruzi Herbert Walt..., 1963 | |
| Theridion otsospotum Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion ovale ♰ C. L. Koch, 1854 | |
| Theridion ovatum ♰ (C. L. Koch, 1854) | ⇒ Enoplognatha margarita Yaginuma, 1964 |
| Theridion oxyurum (Thorell, 1890) | ⇒ Chikunia nigra O.Pickard-Ca..., 1880 |
| Theridion palanum Michael J. R..., 1983 | Jawla paste shrimp |
| Theridion palgongense Kap Yong Paik, 1996 | |
| Theridion pallasi A. V. Ponomarev, 2007 | |
| Theridion pallens (O. Pickard-C..., 1879) | ⇒ Paidiscura pallens John Blackwall, 1834 |
| Theridion pallidulum Carl Friedri..., 1942 | |
| Theridion pallidum (Walckenaer, 1842) | ⇒ Theridion pallidulum Carl Friedri..., 1942 |
| Theridion pallipes Keyserling, 1891 | |
| Theridion palmgreni Yuri M. Maru..., 1986 | |
| Theridion pandani Eugène Simon, 1895 | |
| Theridion panganii Lodovico di ..., 1947 | |
| Theridion papillatum Gao & Li, 2014 | |
| Theridion paraense Herbert Walt..., 1963 | |
| Theridion parallelum Wider, 1834 | |
| Theridion parvipalpe Wider, 1834 | |
| Theridion parvulum John Blackwall, 1870 | |
| Theridion parvum Eugen von Ke..., 1884 | Guinea ant |
| Theridion patrizii Lodovico di ..., 1933 | |
| Theridion pelaezi Herbert Walt..., 1963 | |
| Theridion pennsylvanicum James Henry ..., 1913 | |
| Theridion perkinsi Eugène Simon, 1900 | |
| Theridion pernambucum Herbert Walt..., 1963 | |
| Theridion perniciosum Keyserling, 1886 | |
| Theridion perpusillum Eugène Simon, 1885 | |
| Theridion petraeum (Ludwig Carl ..., 1872) | ⇒ Theridion wiehlei Ehrenfried S..., 1938 |
| Theridion petrunkevitchi Lucien Berland, 1920 | |
| Theridion phaeostomum Eugène Simon, 1909 | |
| Theridion pico (Merrett & As..., 1989) | ⇒ Rugathodes pico Merrett & As..., 1989 |
| Theridion pictipes (Keyserling, 1884) | ⇒ Phylloneta pictipes Keyserling, 1884 |
| Theridion pictum (Charles Atha..., 1802) | ⇒ Theridion hemerobium Eugène Simon, 1914 |
| Theridion pierre Levi & Patrick, 2013 | |
| Theridion pigrum Eugen von Ke..., 1886 | |
| Theridion pilatum Arthur T. Ur..., 1893 | |
| Theridion piligerum Frauenfeld, 1867 | |
| Theridion piliphilum Embrik Strand, 1907 | Carpenter bees |
| Theridion pinastri (Ludwig Carl ..., 1872) | ⇒ Theridion hotanense Zhu & Zhou, 1993 |
| Theridion pingue | |
| Theridion pinguiculum Eugène Simon, 1909 | |
| Theridion pinicola Eugène Simon, 1873 | |
| Theridion pires Herbert Walt..., 1963 | |
| Theridion piriforme Lucien Berland, 1938 | |
| Theridion piriformis Berland, 1938 | |
| Theridion placens Keyserling, 1884 | |
| Theridion plaumanni Herbert Walt..., 1963 | |
| Theridion plectile Eugène Simon, 1909 | |
| Theridion plumipes Hasselt, 1882 | |
| Theridion pluviale Albert Tullgren, 1910 | |
| Theridion poecilum Chuandian Zhu, 1998 | |
| Theridion porphyreticum Arthur T. Ur..., 1889 | |
| Theridion portoricense Petrunkevitch, 1930 | |
| Theridion positivum Ralph Vary C..., 1924 | |
| Theridion posticatum Eugène Simon, 1900 | |
| Theridion postmarginatum Albert Tullgren, 1910 | |
| Theridion praeclusum Albert Tullgren, 1910 | |
| Theridion praemite Eugène Simon, 1907 | |
| Theridion praetextum Eugène Simon, 1900 | |
| Theridion praetextum concolor Simon, 1900 | |
| Theridion praetextum praetextum Simon, 1900 | |
| Theridion prominens John Blackwall, 1870 | |
| Theridion promiscuum Domènech & C..., 2020 | |
| Theridion properum (Keyserling, 1890) | ⇒ Achaearanea propera Eugen von Ke..., 1890 |
| Theridion prospero Bellvert & A..., 2021 | |
| Theridion proximum George Newbo..., 1964 | |
| Theridion puellae George Hazel..., 1980 | |
| Theridion pulanense Hsen Hsu Hu, 2001 | |
| Theridion pumilio Arthur T. Ur..., 1886 | |
| Theridion punctipes James Henry ..., 1924 | |
| Theridion punicapunctatum Arthur T. Ur..., 1891 | |
| Theridion punongpalayum Alberto Barr..., 1995 | Cuckoo wasps |
| Theridion purcelli Octavius Pic..., 1904 | |
| Theridion pusillum Wider, 1834 | |
| Theridion pygmaeum (Sundevall, 1831) | ⇒ Hypsosinga pygmaea Sundevall, 1831 |
| Theridion pyramidale Ludwig Carl ..., 1867 | |
| Theridion pyrenaeum J. Denis, 1944 | |
| Theridion qingzangense Hsen Hsu Hu, 2001 | |
| Theridion quadratum Octavius Pic..., 1882 | |
| Theridion quadrilineatum Lenz, 1886 | |
| Theridion quadripapulatum Tord Tamerla..., 1895 | |
| Theridion quadripartitum Eugen von Ke..., 1891 | |
| Theridion querulum Keyserling, 1891 | |
| Theridion rabuni Ralph Vary C..., 1944 | |
| Theridion rafflesi Eugène Simon, 1899 | Euglossine |
| Theridion rampum Herbert Walt..., 1963 | |
| Theridion rarum | |
| Theridion ravum Herbert Walt..., 1963 | |
| Theridion refugum Drensky, 1929 | |
| Theridion reinhardti Charitonov, 1946 | |
| Theridion resum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion retreatense Embrik Strand, 1909 | |
| Theridion retrocitum Eugène Simon, 1909 | |
| Theridion rhodonotum Eugène Simon, 1909 | |
| Theridion ricense Herbert Walt..., 1959 | |
| Theridion riparia Blackwall, 1834 | |
| Theridion rossi Herbert Walt..., 1963 | |
| Theridion rostriferum Eugène Simon, 1895 | |
| Theridion rothi Herbert Walt..., 1959 | |
| Theridion rubicundum F.O.Pickard-..., 1902 | |
| Theridion rubiginosum Eugen von Ke..., 1884 | Guinea ant |
| Theridion rubripes (Sundevall, 1830) | ⇒ Hylyphantes graminicola Sundevall, 1830 |
| Theridion rubrum Eugen von Ke..., 1886 | |
| Theridion rufipes (Lucas, 1846) | ⇒ Nesticodes rufipes Lucas, 1846 |
| Theridion rurrenabaque Herbert Walt..., 1963 | |
| Theridion ruwenzoricola Embrik Strand, 1913 | |
| Theridion saanichum Ralph Vary C..., 1947 | |
| Theridion sabinjonis Embrik Strand, 1913 | |
| Theridion sadani Monga & Singh, 1989 | |
| Theridion salvadorense Kraus, 1955 | |
| Theridion samoense Lucien Berland, 1929 | |
| Theridion samoensis Berland, 1929 | |
| Theridion sanctum Herbert Walt..., 1959 | |
| Theridion sangzhiense Chuandian Zhu, 1998 | |
| Theridion santaanae Kraus, 1955 | |
| Theridion sardis Ralph Vary C..., 1944 | |
| Theridion saropus Tord Tamerla..., 1887 | |
| Theridion schlingeri Herbert Walt..., 1963 | |
| Theridion schrammeli Herbert Walt..., 1963 | |
| Theridion sciaphilum Pierre L. G...., 1977 | |
| Theridion scorinum Roberts, 1977 | |
| Theridion semitinctum Eugène Simon, 1914 | |
| Theridion senckenbergi Herbert Walt..., 1963 | |
| Theridion septempunctatum Lucien Berland, 1933 | |
| Theridion serpatusum Guan & Zhu, 1993 | |
| Theridion sertatum Eugène Simon, 1909 | |
| Theridion setiferum Carl Friedri..., 1942 | |
| Theridion setosum Ludwig Carl ..., 1872 | |
| Theridion setum Chuandian Zhu, 1998 | |
| Theridion seximaculatum (Chuandian Zhu, 1998) | ⇒ Anelosimus seximaculatus Zhu, 1998 |
| Theridion sexmaculatum Keyserling, 1884 | |
| Theridion sexpunctatum (Emerton, 1915) | ⇒ Rugathodes sexpunctatus James Henry ..., 1882 |
| Theridion sibiricum Yuri M. Marusik, 1988 | |
| Theridion signatum Keyserling, 1891 | |
| Theridion simile (Koch, 1836) | ⇒ Simitidion simile Carl Ludwig ..., 1836 |
| Theridion simplex ♰ (C. L. Koch, 1854) | ⇒ Theridion sulawesiense Yuri M. Maru..., 2005 |
| Theridion sinaloa Herbert Walt..., 1959 | |
| Theridion sisiphum (Walckenaer, 1805) | ⇒ Parasteatoda lunata Carl Alexand..., 1757 |
| Theridion sisyphium (Clerck, 1757) | ⇒ Phylloneta sisyphia Clerck, 1757 |
| Theridion sisyphium foliiferum (Thorell, 1875) | ⇒ Phylloneta sisyphia foliifera Thorell, 1875 |
| Theridion soaresi Herbert Walt..., 1963 | |
| Theridion societatis Lucien Berland, 1934 | |
| Theridion solium Pierre L. G...., 1977 | |
| Theridion speratum | |
| Theridion spinigerum William Jose..., 1916 | |
| Theridion spinitarse (Octavius Pic..., 1876) | ⇒ Theridula aelleni Hubert, 1970 |
| Theridion spiniventre (O. P.-Cambridge, 1869) | ⇒ Chrysso spiniventris O. P.-Cambridge, 1869 |
| Theridion spinosissimum Lodovico di ..., 1934 | |
| Theridion squalidum Arthur T. Ur..., 1886 | |
| Theridion squamosum Gao & Li, 2014 | |
| Theridion stamotum Herbert Walt..., 1963 | |
| Theridion stannardi Herbert Walt..., 1963 | |
| Theridion strepitus Peck & Shear, 1987 | |
| Theridion striatum Eugen von Ke..., 1884 | Guinea ant |
| Theridion stylifrons Simon, 1894 | |
| Theridion styligerum Frederick Oc..., 1902 | |
| Theridion suaveolens (Simon, 1879) | ⇒ Neottiura suaveolens Simon, 1879 |
| Theridion subadultum | |
| Theridion subitum Octavius Pic..., 1885 | |
| Theridion submirabile Zhu & Da-xia..., 1993 | |
| Theridion submissum Willis J. Ge..., 1936 | |
| Theridion subpallens (Boes.et Str., 1906) | ⇒ Paidiscura subpallens Bösenberg & ..., 1906 |
| Theridion subpingue Eugène Simon, 1908 | |
| Theridion subplaumanni Liu & Peng, 2012 | |
| Theridion subradiatum Eugène Simon, 1901 | |
| Theridion subrotundum Eugen von Ke..., 1891 | |
| Theridion subundatum Zhou, Irfan ..., 2024 | |
| Theridion subvittatum Eugène Simon, 1889 | |
| Theridion sulawesiense Yuri M. Maru..., 2005 | |
| Theridion sulcifrons Wider, 1834 | |
| Theridion swarczewskii Wierzbicki, 1902 | |
| Theridion sycorax Bellvert & A..., 2021 | |
| Theridion t-notatum Tord Tamerla..., 1895 | |
| Theridion taegense Kap Yong Paik, 1996 | |
| Theridion taeniatum Keyserling, 1884 | |
| Theridion tahitiae Lucien Berland, 1934 | |
| Theridion tamerlani Carl Friedri..., 1942 | |
| Theridion tayrona Müller & Hei..., 1990 | |
| Theridion tebanum Herbert Walt..., 1963 | |
| Theridion teliferum Eugène Simon, 1895 | |
| Theridion tenellum Carl Ludwig ..., 1841 | |
| Theridion tengchongense Liu & Peng, 2012 | |
| Theridion tengchongensis Liu & Peng, 2012 | |
| Theridion tenuissimum Tord Tamerla..., 1898 | |
| Theridion tepidariorum (C. L. Koch, 1841) | ⇒ Parasteatoda tepidariorum C. L. Koch, 1841 |
| Theridion teresae Herbert Walt..., 1963 | |
| Theridion teroshriensis Biswas, 2025 | |
| Theridion terrestre Wider, 1834 | |
| Theridion tesselatum Keyserling, 1884 | |
| Theridion tessellatum Tord Tamerla..., 1899 | Black carpenter ant |
| Theridion teutanoides Lodovico di ..., 1949 | |
| Theridion thalia Workman, 1878 | |
| Theridion theridioides (Eugen von Ke..., 1890) | ⇒ Theridion hui Chuandian Zhu, 1998 |
| Theridion thoracica Hahn, 1833 | |
| Theridion thoracicum Hahn, 1833 | |
| Theridion thorelli (Ludwig Carl ..., 1865) | ⇒ Theridion adjacens Octavius Pic..., 1896 |
| Theridion tibiale Hahn, 1831 | |
| Theridion tigrae Esyunin & Ef..., 1996 | |
| Theridion tikaderi Patel, 1973 | |
| Theridion timpanogos Herbert Walt..., 1957 | |
| Theridion tinctorium Eugen von Ke..., 1891 | |
| Theridion tinctum (Charles Atha..., 1802) | ⇒ Platnickina tincta Walckenaer, 1802 |
| Theridion todinum Eugène Simon, 1880 | |
| Theridion topo Herbert Walt..., 1963 | |
| Theridion torosum Eugen von Ke..., 1884 | Guinea ant |
| Theridion trahax John Blackwall, 1866 | |
| Theridion transgressum Alexander Pe..., 1911 | |
| Theridion transversum O. Pickard-C..., 1898 | |
| Theridion trepidum Octavius Pic..., 1898 | Cobweb spiders |
| Theridion triangulare Pelegrin Fra..., 1936 | |
| Theridion trifile Eugène Simon, 1907 | |
| Theridion trigonicum Tord Tamerla..., 1890 | Sand bee |
| Theridion tristani Herbert Walt..., 1959 | Cobweb spiders |
| Theridion triviale Tord Tamerla..., 1881 | Golden cricket wasp |
| Theridion trizonatum Lodovico di ..., 1949 | |
| Theridion troglodytes (Higgins & Pe..., 1884) | ⇒ Hickmania troglodytes Higgins & Pe..., 1883 |
| Theridion tubicola Carl Ludwig ..., 1859 | |
| Theridion tungurahua (Herbert Walt..., 1963) | ⇒ Exalbidion fungosum Keyserling, 1886 |
| Theridion turanicum Charitonov, 1946 | |
| Theridion turrialba Herbert Walt..., 1959 | Cobweb spiders |
| Theridion uber Eugen von Ke..., 1884 | Guinea ant |
| Theridion uhligi Martin, 1974 | |
| Theridion umbilicus Herbert Walt..., 1963 | |
| Theridion unanimum | |
| Theridion uncatum Frederick Oc..., 1902 | |
| Theridion uncinatum (Lucas, 1846) | ⇒ Neottiura uncinata Hippolyte Lucas, 1846 |
| Theridion undatum (Chuandian Zhu, 1998) | ⇒ Cryptachaea hirta Taczanowski, 1873 |
| Theridion undulanotum Carl Friedri..., 1942 | |
| Theridion undulatum (Bösenberg, 1902) | ⇒ Theridion undulanotum Carl Friedri..., 1942 |
| Theridion urnigerum Tord Tamerla..., 1898 | |
| Theridion ursoi Lodovico di ..., 1947 | |
| Theridion urticae (Walckenaer, 1842) | ⇒ Parasteatoda lunata Carl Alexand..., 1757 |
| Theridion urucum Herbert Walt..., 1963 | |
| Theridion usitum Embrik Strand, 1913 | |
| Theridion utcuyacu Herbert Walt..., 1963 | |
| Theridion valleculum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion vallisalinarum Levy & Amitai, 1982 | |
| Theridion vanhoeffeni Embrik Strand, 1909 | |
| Theridion varians Carl Wilhelm..., 1833 | Red spruce |
| Theridion varians cyrenaicum Caporiacco, 1933 | |
| Theridion varians melanotum Strand, 1907 | |
| Theridion varians rusticum Simon, 1873 | |
| Theridion varians varians Hahn, 1833 | |
| Theridion variosoma ♰ J. Wunderlich, 1988 | |
| Theridion ventillans | |
| Theridion ventricosum William Jose..., 1916 | |
| Theridion vespertinum Gershom Levy, 1985 | |
| Theridion viridanum Arthur T. Ur..., 1887 | |
| Theridion vittatum O. Pickard-C..., 1894 | |
| Theridion vittatus C.L. Koch, 1836 | |
| Theridion vituperabile (Petrunkevitch, 1911) | ⇒ Coleosoma blandum O. P.-Cambridge, 1882 |
| Theridion volatile Keyserling, 1884 | |
| Theridion volubile Eugen von Ke..., 1884 | Guinea ant |
| Theridion vosseleri Embrik Strand, 1907 | Carpenter bees |
| Theridion vosserleri Strand, 1907 | |
| Theridion vossi Embrik Strand, 1907 | Carpenter bees |
| Theridion vossioni Eugène Simon, 1884 | White meadowbeauty |
| Theridion vulgare (Hentz, 1850) | ⇒ Parasteatoda tepidariorum C. L. Koch, 1841 |
| Theridion vulvum Herbert Walt..., 1959 | Cobweb spiders |
| Theridion weberi Tord Tamerla..., 1892 | |
| Theridion weyrauchi Herbert Walt..., 1963 | |
| Theridion whitcombi Sedgwick, 1973 | |
| Theridion wiehlei Ehrenfried S..., 1938 | |
| Theridion workmani Tord Tamerla..., 1887 | |
| Theridion wunderlichi ♰ J. Wunderlich, 1988 | |
| Theridion xanthostichum Rainbow, 1916 | |
| Theridion xianfengense Zhu & Da-xia..., 1992 | |
| Theridion xinjiangense (Hu & Wu, 1989) | ⇒ Heterotheridion nigrovariegatum Eugène Simon, 1873 |
| Theridion yani Chuandian Zhu, 1998 | |
| Theridion yuma Herbert Walt..., 1963 | |
| Theridion yunnanense Ehrenfried S..., 1963 | |
| Theridion yunnanensis Schenkel, 1963 | |
| Theridion yunohamense | |
| Theridion zantholabio Arthur T. Ur..., 1886 | |
| Theridion zebra Lodovico di ..., 1949 | |
| Theridion zebrinum Chuandian Zhu, 1998 | |
| Theridion zekharya Gershom Levy, 2007 | |
| Theridion zhangmuense Hsen Hsu Hu, 2001 | |
| Theridion zhaoi Chuandian Zhu, 1998 | |
| Theridion zhoui Chuandian Zhu, 1998 | |
| Theridion zonarium Eugen von Ke..., 1884 | Guinea ant |
| Theridion zonulatum Tord Tamerla..., 1890 | Sand bee |
