- family: Theridiidae
- genus: Theridion
- species: Theridion abruptum Simon, 1884
- species: Theridion accoense Levy, 1985
- species: Theridion acutitarse Simon, 1900
- species: Theridion adjacens (O. P.-Cambridge, 1896)
- species: Theridion adrianopoli Drensky, 1915
- species: Theridion aeolium Levi, 1963
- species: Theridion agrarium Levi, 1963
- species: Theridion agreste Nicolet, 1849
- species: Theridion agrifoliae Levi, 1957
- species: Theridion akme Levi, 1959
- species: Theridion akron Levi, 1959
- species: Theridion albidorsum Strand, 1909
- species: Theridion albidum Banks, 1895
- species: Theridion albioculum Zhu, 1998
- species: Theridion albipes L. Koch, 1878
- species: Theridion albocinctum Urquhart, 1892
- species: Theridion albodecoratum Rainbow, 1916
- species: Theridion albolineatum Nicolet, 1849
- species: Theridion albolineolatum Caporiacco, 1940
- species: Theridion albomaculosum O. P.-Cambridge, 1869
- species: Theridion albopictum Thorell, 1898
- species: Theridion albostriatum (L. Koch, 1867)
- species: Theridion albulum O. P.-Cambridge, 1898
- species: Theridion altum Levi, 1963
- species: Theridion amarga Levi, 1967
- species: Theridion amatitlan Levi, 1963
- species: Theridion ambiguum Nicolet, 1849
- species: Theridion ampascachi Mello-Leitao, 1941
- species: Theridion ampliatum Urquhart, 1892
- species: Theridion angusticeps Caporiacco, 1949
- species: Theridion angustifrons Caporiacco, 1934
- species: Theridion annulipes O. P.-Cambridge, 1869
- species: Theridion anson Levi, 1967
- species: Theridion antillanum Simon, 1894
- species: Theridion antron Levi, 1963
- species: Theridion apiculatum Roewer, 1942
- species: Theridion aporum Levi, 1963
- species: Theridion apostoli Mello-Leitao, 1945
- species: Theridion apulco Levi, 1959
- species: Theridion aragua Levi, 1963
- species: Theridion archeri Levi, 1959
- species: Theridion argentatulum Roewer, 1942
- species: Theridion arizonense Levi, 1957
- species: Theridion artum Levi, 1959
- species: Theridion aruanum Strand, 1911
- species: Theridion arushae Caporiacco, 1947
- species: Theridion asbolodes Rainbow, 1917
- species: Theridion astrigerum Thorell, 1895
- species: Theridion atratum Thorell, 1877
- species: Theridion attritum (Simon, 1908)
- species: Theridion auberti Simon, 1904
- species: Theridion aulos Levi, 1963
- species: Theridion australe Banks, 1899
- species: Theridion baccula Thorell, 1887
- species: Theridion baltasarense Levi, 1963
- species: Theridion banksi Berland, 1920
- species: Theridion barbarae Levi, 1959
- species: Theridion beebei Levi, 1963
- species: Theridion bellatulum Levi, 1963
- species: Theridion bergi Levi, 1963
- species: Theridion berlandi Roewer, 1942
- species: Theridion betteni Wiehle, 1960
- species: Theridion bicruciatum Roewer, 1961
- species: Theridion bidepressum Yin, Peng & Zhang, 2005
- species: Theridion biezankoi Levi, 1963
- species: Theridion biforaminum Gao & Zhu, in Zhu, Gao & Guan, 1993
- species: Theridion biolleyi Banks, 1909
- species: Theridion biseriatum Thorell, 1890
- species: Theridion bitakum Barrion & Litsinger, 1995
- species: Theridion blackwalli O. P.-Cambridge, 1871
- species: Theridion blaisei Simon, 1909
- species: Theridion boesenbergi Strand, 1904
- species: Theridion bolivari Levi, 1959
- species: Theridion bolum Levi, 1963
- species: Theridion bomae Schmidt, 1957
- species: Theridion botanicum Levi, 1963
- species: Theridion brachypus Thorell, 1887
- species: Theridion bradyanum Strand, 1907
- species: Theridion brunellii Caporiacco, 1940
- species: Theridion brunneonigrum Caporiacco, 1949
- species: Theridion bryantae Roewer, 1951
- species: Theridion bullatum Tullgren, 1910
- species: Theridion buxtoni Berland, 1929
- species: Theridion calcynatum Holmberg, 1876
- species: Theridion californicum Banks, 1904
- species: Theridion caliginosum Marples, 1955
- species: Theridion cameronense Levi, 1957
- species: Theridion campestratum Simon, 1900
- species: Theridion caplandense Strand, 1907
- species: Theridion carinatum Yin, Peng & Zhang, 2005
- species: Theridion carpathium Brignoli, 1984
- species: Theridion cassinicola Simon, 1907
- species: Theridion castaneum Franganillo, 1931
- species: Theridion catharina Marples, 1955
- species: Theridion cavipalpe (Cambridge, 1902)
- species: Theridion cazieri Levi, 1959
- species: Theridion centrum Levi, 1959
- species: Theridion chacoense Levi, 1963
- species: Theridion chakinuense Wunderlich, 1995
- species: Theridion chamberlini Caporiacco, 1949
- species: Theridion charitonowi Caporiacco, 1949
- species: Theridion cheimatos Gertsch & Archer, 1942
- species: Theridion cheni Zhu, 1998
- species: Theridion chihuahua Levi, 1959
- species: Theridion chiriqui Levi, 1959
- species: Theridion chonetum Zhu, 1998
- species: Theridion choroni Levi, 1963
- species: Theridion cinctipes Banks, 1898
- species: Theridion cinereum Thorell, 1875
- species: Theridion circumtextum Simon, 1907
- species: Theridion climacode Thorell, 1898
- species: Theridion clivalum Zhu, 1998
- species: Theridion cloxum Roberts, 1983
- species: Theridion clypeatellum Tullgren, 1910
- species: Theridion cochise Levi, 1963
- species: Theridion cochrum Levi, 1963
- species: Theridion cocosense Strand, 1906
- species: Theridion coenosum Thorell, 1887
- species: Theridion cohni Levi, 1963
- species: Theridion coldeniae Baert & Maelfait, 1986
- species: Theridion comstocki Berland, 1920
- species: Theridion confusum O. P.-Cambridge, 1885
- species: Theridion conigerum Simon, 1914
- species: Theridion contreras Levi, 1959
- species: Theridion convexellum Roewer, 1942
- species: Theridion convexisternum Caporiacco, 1949
- species: Theridion corcyraeum Brignoli, 1984
- species: Theridion costaricaense Levi, 1963
- species: Theridion cowlesae Levi, 1957
- species: Theridion coyoacan Levi, 1959
- species: Theridion crinigerum Simon, 1881
- species: Theridion cruciferum Urquhart, 1886
- species: Theridion crucum Levi, 1959
- species: Theridion cuspulatum Schmidt & Krause, 1998
- species: Theridion cuyutlan Levi, 1963
- species: Theridion cynicum Gertsch & Mulaik, 1936
- species: Theridion dafnense Levy & Amitai, 1982
- species: Theridion darolense Strand, 1906
- species: Theridion davisorum Levi, 1959
- species: Theridion dayongense Zhu, 1998
- species: Theridion decemmaculatum Thorell, 1890
- species: Theridion decemperlatum (Simon, 1889)
- species: Theridion dedux O. P.-Cambridge, 1904
- species: Theridion delicatum O. P.-Cambridge, 1904
- species: Theridion derhami Simon, 1895
- species: Theridion diadematum Chrysanthus, 1963
- species: Theridion dianiphum Rainbow, 1916
- species: Theridion differens Emerton, 1882
- species: Theridion dilucidum Simon, 1897
- species: Theridion dilutum Levi, 1957
- species: Theridion dividuum Gertsch & Archer, 1942
- species: Theridion dominica Levi, 1963
- species: Theridion dreisbachi Levi, 1959
- species: Theridion dubium Bradley, 1877
- species: Theridion dukouense Zhu, 1998
- species: Theridion dulcineum Gertsch & Archer, 1942
- species: Theridion durbanicum Lawrence, 1947
- species: Theridion ecuadorense Levi, 1963
- species: Theridion egyptium Fawzy & El Erksousy, 2002
- species: Theridion electum (O. P.-Cambridge, 1896)
- species: Theridion elegantissimum Roewer, 1942
- species: Theridion elevatum Thorell, 1881
- species: Theridion elimatum L. Koch, 1882
- species: Theridion elisabethae Roewer, 1951
- species: Theridion elli Sedgwick, 1973
- species: Theridion ellicottense Dobyns & Bond, 1996
- species: Theridion emertoni Berland, 1920
- species: Theridion epiense Berland, 1938
- species: Theridion eremum Levi, 1963
- species: Theridion eugeni Roewer, 1942
- species: Theridion evexum Keyserling, 1884
- species: Theridion excavatum Cambridge, 1902
- species: Theridion exlineae Levi, 1963
- species: Theridion expallidatum O. P.-Cambridge, 1885
- species: Theridion familiare O. P.-Cambridge, 1871
- species: Theridion fastosum Keyserling, 1884
- species: Theridion fatuhivaense Berland, 1933
- species: Theridion femorale Thorell, 1881
- species: Theridion femoratissimum Caporiacco, 1949
- species: Theridion fernandense Simon, 1907
- species: Theridion filum Levi, 1963
- species: Theridion flabelliferum Urquhart, 1887
- species: Theridion flavonotatum Becker, 1879
- species: Theridion flavoornatum Thorell, 1898
- species: Theridion fornicatum Simon, 1884
- species: Theridion frio Levi, 1959
- species: Theridion frizzellorum Levi, 1963
- species: Theridion frondeum Hentz, 1850
- species: Theridion fruticum Simon, 1890
- species: Theridion fungosum Keyserling, 1886
- species: Theridion furfuraceum Simon, 1914
- species: Theridion fuscodecoratum Rainbow, 1916
- species: Theridion fuscomaculatum Rainbow, 1916
- species: Theridion fuscum Franganillo, 1930
- species: Theridion gabardi Simon, 1895
- species: Theridion galerum Levi, 1959
- species: Theridion gekkonicum Levy & Amitai, 1982
- species: Theridion geminipunctum Chamberlin, 1924
- species: Theridion genistae Simon, 1873
- species: Theridion genistae turanicum Charitonov, 1946
- species: Theridion gentile Simon, 1881
- species: Theridion gertschi Levi, 1959
- species: Theridion gibbum Rainbow, 1916
- species: Theridion gigantipes Keyserling, 1890
- species: Theridion giraulti Rainbow, 1916
- species: Theridion glaciale Caporiacco, 1934
- species: Theridion glaucescens Becker, 1879
- species: Theridion glaucinum Simon, 1881
- species: Theridion goodnightorum Levi, 1957
- species: Theridion gracilipes Urquhart, 1889
- species: Theridion grallator Simon, 1900
- species: Theridion gramineum Zhu, 1998
- species: Theridion grammatophorum Simon, 1909
- species: Theridion grancanariense Wunderlich, 1987
- species: Theridion grandiosum Levi, 1963
- species: Theridion grecia Levi, 1959
- species: Theridion gyirongense Hu & Li, 1987
- species: Theridion hainenense Zhu, 1998
- species: Theridion haleakalense Simon, 1900
- species: Theridion hannoniae Denis, 1944
- species: Theridion hartmeyeri Simon, 1908
- species: Theridion hassleri Levi, 1963
- species: Theridion hebridisianum Berland, 1938
- species: Theridion helophorum Thorell, 1895
- species: Theridion hemerobium Simon, 1914
- species: Theridion hermonense Levy, 1991
- species: Theridion hewitti Caporiacco, 1949
- species: Theridion hidalgo Levi, 1957
- species: Theridion hierichonticum Levy & Amitai, 1982
- species: Theridion hispidum O. P.-Cambridge, 1898
- species: Theridion histrionicum Thorell, 1875
- species: Theridion hondurense Levi, 1959
- species: Theridion hopkinsi Berland, 1929
- species: Theridion hotanense Zhu & Zhou, 1993
- species: Theridion huanuco Levi, 1963
- species: Theridion hufengensis Tang, Yin & Peng, 2005
- species: Theridion hui Zhu, 1998
- species: Theridion humboldti Levi, 1967
- species: Theridion hummeli Schenkel, 1936
- species: Theridion idiotypum Rainbow, 1917
- species: Theridion illecebrosum Simon, 1886
- species: Theridion impegrum Keyserling, 1886
- species: Theridion impressithorax Simon, 1895
- species: Theridion impressum L. Koch, 1881
- species: Theridion incanescens Simon, 1890
- species: Theridion incertissimum (Caporiacco, 1954)
- species: Theridion incertum O. P.-Cambridge, 1885
- species: Theridion incomtum (O. P.-Cambridge, 1896)
- species: Theridion inconspicuum Thorell, 1898
- species: Theridion indicum Tikader, 1977
- species: Theridion innocuum Thorell, 1875
- species: Theridion inquinatum Thorell, 1878
- species: Theridion inquinatum continentale Strand, 1907
- species: Theridion insignitarse Simon, 1907
- species: Theridion intritum (Bishop & Crosby, 1926)
- species: Theridion iramon Levi, 1963
- species: Theridion ischagosum Barrion & Litsinger, 1995
- species: Theridion isorium Levi, 1963
- species: Theridion istokpoga Levi, 1957
- species: Theridion italiense Wunderlich, 1995
- species: Theridion jordanense Levy & Amitai, 1982
- species: Theridion kambalum Barrion & Litsinger, 1995
- species: Theridion karamayense Zhu, 1998
- species: Theridion kauaiense Simon, 1900
- species: Theridion kawea Levi, 1957
- species: Theridion kibonotense Tullgren, 1910
- species: Theridion kiliani Müller & Heimer, 1990
- species: Theridion kobrooricum Strand, 1911
- species: Theridion kochi Roewer, 1942
- species: Theridion kollari Doleschall, 1852
- species: Theridion kraepelini Simon, 1905
- species: Theridion kraussi Marples, 1957
- species: Theridion lacticolor Berland, 1920
- species: Theridion laevigatum Blackwall, 1870
- species: Theridion lago Levi, 1963
- species: Theridion lamperti Strand, 1906
- species: Theridion lanceatum Zhang & Zhu, 2007
- species: Theridion lapidicola Kulczynski, 1887
- species: Theridion latisternum Caporiacco, 1934
- species: Theridion lawrencei Gertsch & Archer, 1942
- species: Theridion leechi Gertsch & Archer, 1942
- species: Theridion leguiai Chamberlin, 1916
- species: Theridion lenzianum Strand, 1907
- species: Theridion leones Levi, 1959
- species: Theridion leucophaeum Simon, 1905
- species: Theridion leve Blackwall, 1877
- species: Theridion leviorum Gertsch & Riechert, 1976
- species: Theridion liaoyuanense (Zhu & Yu, 1982)
- species: Theridion limatum Tullgren, 1910
- species: Theridion limitatum L. Koch, 1872
- species: Theridion linaresense Levi, 1963
- species: Theridion linzhiense Hu, 2001
- species: Theridion llano Levi, 1957
- species: Theridion lomirae Roewer, 1938
- species: Theridion longicrure Marples, 1956
- species: Theridion longihirsutum Strand, 1907
- species: Theridion longipalpum Zhu, 1998
- species: Theridion longipedatum Roewer, 1942
- species: Theridion ludekingi Thorell, 1890
- species: Theridion ludius Simon, 1880
- species: Theridion lumabani Barrion & Litsinger, 1995
- species: Theridion luteitarse Schmidt & Krause, 1995
- species: Theridion macei Simon, 1895
- species: Theridion machu Levi, 1963
- species: Theridion macropora Tang, Yin & Peng, 2006
- species: Theridion macuchi Levi, 1963
- species: Theridion maculiferum Roewer, 1942
- species: Theridion magdalenense Müller & Heimer, 1990
- species: Theridion maindroni Simon, 1905
- species: Theridion manjithar Tikader, 1970
- species: Theridion manonoense Marples, 1955
- species: Theridion maranum Levi, 1963
- species: Theridion maron Levi, 1963
- species: Theridion martini Levi, 1959
- species: Theridion mataafa Marples, 1955
- species: Theridion mauense Caporiacco, 1949
- species: Theridion mauiense Simon, 1900
- species: Theridion mehlum Roberts, 1983
- species: Theridion melanoplax Schmidt & Krause, 1996
- species: Theridion melanoprorum Thorell, 1895
- species: Theridion melanoprorum orientale Simon, 1909
- species: Theridion melanosternon Mello-Leitao, 1947
- species: Theridion melanostictum O. P.-Cambridge, 1876
- species: Theridion melanurum Hahn, 1831
- species: Theridion melinum Simon, 1900
- species: Theridion mendozae Berland, 1933
- species: Theridion meneghettii Caporiacco, 1949
- species: Theridion metabolum Chamberlin & Ivie, 1936
- species: Theridion metator Simon, 1907
- species: Theridion michelbacheri Levi, 1957
- species: Theridion micheneri Levi, 1963
- species: Theridion minutissimum Keyserling, 1884
- species: Theridion minutulum Thorell, 1895
- species: Theridion miserum Thorell, 1898
- species: Theridion modestum (Simon, 1894)
- species: Theridion molliculum Thorell, 1899
- species: Theridion mollissimum L. Koch, 1872
- species: Theridion montanum Emerton, 1882
- species: Theridion monzonense Levi, 1963
- species: Theridion mortuale Simon, 1908
- species: Theridion morulum O. P.-Cambridge, 1898
- species: Theridion murarium Emerton, 1882
- species: Theridion musivivoides Schmidt & Krause, 1995
- species: Theridion musivivum Schmidt, 1956
- species: Theridion musivum Simon, 1873
- species: Theridion myersi Levi, 1957
- species: Theridion mystaceum L. Koch, 1870
- species: Theridion mysteriosum Schmidt, 1971
- species: Theridion nadleri Levi, 1959
- species: Theridion nagorum Roberts, 1983
- species: Theridion nasinotum Caporiacco, 1949
- species: Theridion nasutum Wunderlich, 1995
- species: Theridion necijaense Barrion & Litsinger, 1995
- species: Theridion negebense Levy & Amitai, 1982
- species: Theridion neomexicanum Banks, 1901
- species: Theridion neshamini Levi, 1957
- species: Theridion nesticum Levi, 1963
- species: Theridion nigriceps Keyserling, 1891
- species: Theridion nigroannulatum Keyserling, 1884
- species: Theridion nigroplagiatum Caporiacco, 1949
- species: Theridion nigropunctatum Lucas, 1846
- species: Theridion nigropunctulatum Thorell, 1898
- species: Theridion nigrosacculatum Tullgren, 1910
- species: Theridion nigrovariegatum Simon, 1873
- species: Theridion nilgherinum Simon, 1905
- species: Theridion niphocosmum Rainbow, 1916
- species: Theridion niveopunctatum Thorell, 1898
- species: Theridion niveum O. P.-Cambridge, 1898
- species: Theridion nivosum Rainbow, 1916
- species: Theridion nodiferum Simon, 1895
- species: Theridion nojimai Yoshida, 1999
- species: Theridion nudum Levi, 1959
- species: Theridion oatesi Thorell, 1895
- species: Theridion obscuratum Zhu, 1998
- species: Theridion ochreolum Levy & Amitai, 1982
- species: Theridion octoferum Strand, 1909
- species: Theridion odoratum Zhu, 1998
- species: Theridion ohlerti Thorell, 1870
- species: Theridion ohlerti lundbecki Sorensen, 1898
- species: Theridion olaup Levi, 1963
- species: Theridion omiltemi Levi, 1959
- species: Theridion onticolum Levi, 1963
- species: Theridion opolon Levi, 1963
- species: Theridion opuntia Levi, 1963
- species: Theridion orgea (Levi, 1967)
- species: Theridion orlando (Archer, 1950)
- species: Theridion osprum Levi, 1963
- species: Theridion oswaldocruzi Levi, 1963
- species: Theridion otsospotum Barrion & Litsinger, 1995
- species: Theridion palanum Roberts, 1983
- species: Theridion palgongense Paik, 1996
- species: Theridion pallidulum Roewer, 1942
- species: Theridion palmgreni Marusik & Cellarius, 1986
- species: Theridion pandani Simon, 1895
- species: Theridion panganii Caporiacco, 1947
- species: Theridion paraense Levi, 1963
- species: Theridion parvulum Blackwall, 1870
- species: Theridion parvum Keyserling, 1884
- species: Theridion patrizii Caporiacco, 1933
- species: Theridion pelaezi Levi, 1963
- species: Theridion pennsylvanicum Emerton, 1913
- species: Theridion perkinsi Simon, 1900
- species: Theridion pernambucum Levi, 1963
- species: Theridion perpusillum Simon, 1885
- species: Theridion petraeum L. Koch, 1872
- species: Theridion petrunkevitchi Berland, 1920
- species: Theridion phaeostomum Simon, 1909
- species: Theridion pictipes Keyserling, 1884
- species: Theridion pictum (Walckenaer, 1802)
- species: Theridion pigrum Keyserling, 1886
- species: Theridion pilatum Urquhart, 1893
- species: Theridion piligerum Frauenfeld, 1867
- species: Theridion piliphilum Strand, 1907
- species: Theridion pinastri L. Koch, 1872
- species: Theridion pinguiculum Simon, 1909
- species: Theridion pinicola Simon, 1873
- species: Theridion pires Levi, 1963
- species: Theridion piriforme Berland, 1938
- species: Theridion plaumanni Levi, 1963
- species: Theridion plectile Simon, 1909
- species: Theridion plumipes Hasselt, 1882
- species: Theridion pluviale Tullgren, 1910
- species: Theridion poecilum Zhu, 1998
- species: Theridion porphyreticum Urquhart, 1889
- species: Theridion positivum Chamberlin, 1924
- species: Theridion posticatum Simon, 1900
- species: Theridion postmarginatum Tullgren, 1910
- species: Theridion praeclusum Tullgren, 1910
- species: Theridion praemite Simon, 1907
- species: Theridion praetextum Simon, 1900
- species: Theridion praetextum concolor Simon, 1900
- species: Theridion prominens Blackwall, 1870
- species: Theridion proximum Lawrence, 1964
- species: Theridion puellae Locket, 1980
- species: Theridion pulanense Hu, 2001
- species: Theridion pumilio Urquhart, 1886
- species: Theridion punctipes Emerton, 1924
- species: Theridion punicapunctatum Urquhart, 1891
- species: Theridion punongpalayum Barrion & Litsinger, 1995
- species: Theridion purcelli O. P.-Cambridge, 1904
- species: Theridion pyramidale L. Koch, 1867
- species: Theridion pyrenaeum Denis, 1944
- species: Theridion qingzangense Hu, 2001
- species: Theridion quadratum (O. P.-Cambridge, 1882)
- species: Theridion quadrilineatum Lenz, 1886
- species: Theridion quadripapulatum Thorell, 1895
- species: Theridion quadripartitum Keyserling, 1891
- species: Theridion rabuni Chamberlin & Ivie, 1944
- species: Theridion rafflesi Simon, 1899
- species: Theridion rampum Levi, 1963
- species: Theridion ravum Levi, 1963
- species: Theridion refugum Drensky, 1929
- species: Theridion reinhardti Charitonov, 1946
- species: Theridion resum Levi, 1959
- species: Theridion retreatense Strand, 1909
- species: Theridion retrocitum Simon, 1909
- species: Theridion rhodonotum Simon, 1909
- species: Theridion ricense Levi, 1959
- species: Theridion rossi Levi, 1963
- species: Theridion rostriferum Simon, 1895
- species: Theridion rothi Levi, 1959
- species: Theridion rubiginosum Keyserling, 1884
- species: Theridion rubrum (Keyserling, 1886)
- species: Theridion rurrenabaque Levi, 1963
- species: Theridion ruwenzoricola Strand, 1913
- species: Theridion saanichum Chamberlin & Ivie, 1947
- species: Theridion sabinjonis Strand, 1913
- species: Theridion sadani Monga & Singh, 1989
- species: Theridion samoense Berland, 1929
- species: Theridion sanctum Levi, 1959
- species: Theridion sangzhiense Zhu, 1998
- species: Theridion sardis Chamberlin & Ivie, 1944
- species: Theridion saropus Thorell, 1887
- species: Theridion schlingeri Levi, 1963
- species: Theridion schrammeli Levi, 1963
- species: Theridion sciaphilum Benoit, 1977
- species: Theridion semitinctum Simon, 1914
- species: Theridion senckenbergi Levi, 1963
- species: Theridion septempunctatum Berland, 1933
- species: Theridion serpatusum Guan & Zhu, in Zhu, Gao & Guan, 1993
- species: Theridion sertatum Simon, 1909
- species: Theridion setiferum Roewer, 1942
- species: Theridion setosum L. Koch, 1872
- species: Theridion setum Zhu, 1998
- species: Theridion seximaculatum Zhu, 1998
- species: Theridion sibiricum Marusik, 1988
- species: Theridion sinaloa Levi, 1959
- species: Theridion sisyphium (Clerck, 1757)
- species: Theridion sisyphium foliiferum Thorell, 1875
- species: Theridion sisyphium torandae Strand, 1917
- species: Theridion soaresi Levi, 1963
- species: Theridion societatis Berland, 1934
- species: Theridion solium Benoit, 1977
- species: Theridion spinigerum Rainbow, 1916
- species: Theridion spinitarse O. P.-Cambridge, 1876
- species: Theridion spinosissimum Caporiacco, 1934
- species: Theridion squalidum Urquhart, 1886
- species: Theridion stamotum Levi, 1963
- species: Theridion stannardi Levi, 1963
- species: Theridion strepitus Peck & Shear, 1987
- species: Theridion striatum Keyserling, 1884
- species: Theridion styligerum Cambridge, 1902
- species: Theridion subitum O. P.-Cambridge, 1885
- species: Theridion submirabile Zhu & Song, in Song, Zhu & Li, 1993
- species: Theridion submissum Gertsch & Davis, 1936
- species: Theridion subpingue Simon, 1908
- species: Theridion subradiatum Simon, 1901
- species: Theridion subrotundum Keyserling, 1891
- species: Theridion subvittatum Simon, 1889
- species: Theridion sulawesiense Marusik & Penney, 2005
- species: Theridion swarczewskii Wierzbicki, 1902
- species: Theridion t-notatum Thorell, 1895
- species: Theridion taegense Paik, 1996
- species: Theridion tahitiae Berland, 1934
- species: Theridion tamerlani Roewer, 1942
- species: Theridion tayrona Müller & Heimer, 1990
- species: Theridion tebanum Levi, 1963
- species: Theridion teliferum Simon, 1895
- species: Theridion tenellum C. L. Koch, 1841
- species: Theridion tenuissimum Thorell, 1898
- species: Theridion teresae Levi, 1963
- species: Theridion tessellatum Thorell, 1899
- species: Theridion teutanoides Caporiacco, 1949
- species: Theridion thaleri Marusik, 1988
- species: Theridion thalia Workman, 1878
- species: Theridion theridioides (Keyserling, 1890)
- species: Theridion thorelli L. Koch, 1865
- species: Theridion tigrae Esyunin & Efimik, 1996
- species: Theridion tikaderi Patel, 1973
- species: Theridion timpanogos Levi, 1957
- species: Theridion tinctorium Keyserling, 1891
- species: Theridion todinum Simon, 1880
- species: Theridion topo Levi, 1963
- species: Theridion torosum Keyserling, 1884
- species: Theridion trahax Blackwall, 1866
- species: Theridion transgressum Petrunkevitch, 1911
- species: Theridion trepidum O. P.-Cambridge, 1898
- species: Theridion triangulare Franganillo, 1936
- species: Theridion trifile Simon, 1907
- species: Theridion trigonicum Thorell, 1890
- species: Theridion tristani Levi, 1959
- species: Theridion triviale Thorell, 1881
- species: Theridion trizonatum Caporiacco, 1949
- species: Theridion tubicola Doleschall, 1859
- species: Theridion tungurahua Levi, 1963
- species: Theridion turrialba Levi, 1959
- species: Theridion uber Keyserling, 1884
- species: Theridion uhligi Martin, 1974
- species: Theridion umbilicus Levi, 1963
- species: Theridion uncatum Cambridge, 1902
- species: Theridion undatum Zhu, 1998
- species: Theridion undulanotum Roewer, 1942
- species: Theridion urnigerum Thorell, 1898
- species: Theridion ursoi Caporiacco, 1947
- species: Theridion urucum Levi, 1963
- species: Theridion usitum Strand, 1913
- species: Theridion utcuyacu Levi, 1963
- species: Theridion valleculum Levi, 1959
- species: Theridion vallisalinarum Levy & Amitai, 1982
- species: Theridion vanhoeffeni Strand, 1909
- species: Theridion varians Hahn, 1833
- species: Theridion varians cyrenaicum Caporiacco, 1933
- species: Theridion varians melanotum Strand, 1907
- species: Theridion varians rusticum Simon, 1873
- species: Theridion ventricosum Rainbow, 1916
- species: Theridion vespertinum Levy, 1985
- species: Theridion viridanum Urquhart, 1887
- species: Theridion volubile Keyserling, 1884
- species: Theridion vosserleri Strand, 1907
- species: Theridion vossi Strand, 1907
- species: Theridion vossioni Simon, 1884
- species: Theridion vulvum Levi, 1959
- species: Theridion weberi Thorell, 1892
- species: Theridion weyrauchi Levi, 1963
- species: Theridion whitcombi Sedgwick, 1973
- species: Theridion wiehlei Schenkel, 1938
- species: Theridion workmani Thorell, 1887
- species: Theridion xianfengense Zhu & Song, 1992
- species: Theridion xinjiangense (Hu & Wu, 1989)
- species: Theridion yani Zhu, 1998
- species: Theridion yuma Levi, 1963
- species: Theridion yunnanense Schenkel, 1963
- species: Theridion zantholabio Urquhart, 1886
- species: Theridion zebra Caporiacco, 1949
- species: Theridion zebrinum Zhu, 1998
- species: Theridion zekharya Levy, 2007
- species: Theridion zhangmuense Hu, 2001
- species: Theridion zhaoi Zhu, 1998
- species: Theridion zhoui Zhu, 1998
- species: Theridion zonarium Keyserling, 1884
- species: Theridion zonatum Eydoux & Souleyet, 1841
- species: Theridion zonulatum Thorell, 1890