Di seguito sono elencate tutte le specie di ragni della famiglia Theridiidae il cui genere ha per iniziale dalla lettera T alla lettera Z, note al 12 giugno 2008.

Takayus Takayus Yoshida, 2001 Takayus chikunii (Yaginuma, 1960) — Cina, Giappone Takayus fujisawai Yoshida, 2002 — Giappone Takayus huanrenensis (Zhu & Gao, 1993) — Cina Takayus kunmingicus (Zhu, 1998) — Cina Takayus latifolius (Yaginuma, 1960) — Russia, Cina, Corea, Giappone Takayus linimaculatus (Zhu, 1998) — Cina Takayus lunulatus (Guan & Zhu, 1993) — Russia, Cina, Corea Takayus lushanensis (Zhu, 1998) — Cina Takayus naevius (Zhu, 1998) — Cina Takayus papiliomaculatus Yin, Peng & Zhang, 2005 — Cina Takayus quadrimaculatus (Song & Kim, 1991) — Cina, Corea Takayus sublatifolius (Zhu, 1998) — Cina Takayus takayensis (Saito, 1939) — Cina, Corea, Giappone Takayus wangi (Zhu, 1998) — Cina Takayus xui (Zhu, 1998) — Cina

Tekellina Tekellina Levi, 1957 Tekellina archboldi Levi, 1957 — USA Tekellina bella Marques & Buckup, 1993 — Brasile Tekellina crica Marques & Buckup, 1993 — Brasile Tekellina guaiba Marques & Buckup, 1993 — Brasile Tekellina minor Marques & Buckup, 1993 — Brasile Tekellina pretiosa Marques & Buckup, 1993 — Brasile

Theonoe Theonoe Simon, 1881 Theonoe africana Caporiacco, 1947 — Tanzania Theonoe formivora (Walckenaer, 1842) — Francia Theonoe major Denis, 1961 — Spagna Theonoe minutissima (O. P.-Cambridge, 1879) — Europa, Russia, Ucraina Theonoe sola Thaler & Steinberger, 1988 — Germania, Austria Theonoe stridula Crosby, 1906 — USA, Canada, Alaska

Theridion Theridion Walckenaer, 1805 Theridion abruptum Simon, 1884 — Africa settentrionale Theridion accoense Levy, 1985 — Israele Theridion acutitarse Simon, 1900 — Hawaii Theridion adjacens (O. P.-Cambridge, 1896) — dal Messico al Panama Theridion adrianopoli Drensky, 1915 — Bulgaria, Grecia, Isola di Creta, Turchia Theridion aeolium Levi, 1963 — USA Theridion agrarium Levi, 1963 — Brasile Theridion agreste Nicolet, 1849 — Cile Theridion agrifoliae Levi, 1957 — USA, Canada Theridion akme Levi, 1959 — Panama Theridion akron Levi, 1959 — Panama Theridion albidorsum Strand, 1909 — Sudafrica Theridion albidum Banks, 1895 — USA, Canada Theridion albioculum Zhu, 1998 — Cina Theridion albipes L. Koch, 1878 — Russia, Georgia Theridion albocinctum Urquhart, 1892 — Nuova Zelanda Theridion albodecoratum Rainbow, 1916 — Queensland Theridion albolineatum Nicolet, 1849 — Cile Theridion albolineolatum Caporiacco, 1940 — Etiopia Theridion albomaculosum O. P.-Cambridge, 1869 — Sri Lanka Theridion albopictum Thorell, 1898 — Myanmar Theridion albostriatum (L. Koch, 1867) — Nuova Guinea, Queensland, Tonga, Isola Norfolk (Australia) Theridion albulum O. P.-Cambridge, 1898 — Panama Theridion altum Levi, 1963 — Paraguay Theridion amarga Levi, 1967 — Cile, Argentina Theridion amatitlan Levi, 1963 — Guatemala Theridion ambiguum Nicolet, 1849 — Cile Theridion ampascachi Mello-Leitão, 1941 — Argentina Theridion ampliatum Urquhart, 1892 — Nuova Zelanda Theridion angusticeps Caporiacco, 1949 — Kenya Theridion angustifrons Caporiacco, 1934 — Karakorum Theridion annulipes O. P.-Cambridge, 1869 — Sri Lanka Theridion anson Levi, 1967 — Isole Juan Fernandez (Oceano Pacifico, coste cilene) Theridion antillanum Simon, 1894 — Indie Occidentali Theridion antron Levi, 1963 — Brasile Theridion apiculatum Roewer, 1942 — Queensland Theridion aporum Levi, 1963 — Brasile Theridion apostoli Mello-Leitão, 1945 — Argentina Theridion apulco Levi, 1959 — Messico Theridion aragua Levi, 1963 — Venezuela Theridion archeri Levi, 1959 — Cuba Theridion argentatulum Roewer, 1942 — Nuova Zelanda thumb|Theridion attritum, opistosoma, dorso Theridion arizonense Levi, 1957 — USA Theridion artum Levi, 1959 — Panama, Trinidad Theridion aruanum Strand, 1911 — Isole Aru (Arcipelago delle Molucche) Theridion arushae Caporiacco, 1947 — Tanzania Theridion asbolodes Rainbow, 1917 — Australia meridionale Theridion astrigerum Thorell, 1895 — Myanmar Theridion atratum Thorell, 1877 — Celebes Theridion attritum (Simon, 1908) — Australia occidentale Theridion auberti Simon, 1904 — Sudafrica Theridion aulos Levi, 1963 — Brasile Theridion australe Banks, 1899 — USA, Messico, Indie Occidentali Theridion baccula Thorell, 1887 — Myanmar Theridion baltasarense Levi, 1963 — Isole Sopravento meridionali (Piccole Antille) Theridion banksi Berland, 1920 — Africa orientale Theridion barbarae Levi, 1959 — Messico Theridion beebei Levi, 1963 — Venezuela Theridion bellatulum Levi, 1963 — Brasile Theridion bergi Levi, 1963 — Brasile, Paraguay, Argentina Theridion berlandi Roewer, 1942 — Isole Samoa Theridion betteni Wiehle, 1960 — Regione paleartica Theridion bicruciatum Roewer, 1961 — Senegal Theridion bidepressum Yin, Peng & Zhang, 2005 — Cina Theridion biezankoi Levi, 1963 — Brasile Theridion biforaminum Gao & Zhu, 1993 — Cina Theridion biolleyi Banks, 1909 — Costa Rica Theridion biseriatum Thorell, 1890 — Sumatra Theridion bitakum Barrion & Litsinger, 1995 — Filippine Theridion blackwalli O. P.-Cambridge, 1871 — Europa, Russia, Ucraina, Africa settentrionale Theridion blaisei Simon, 1909 — Vietnam Theridion boesenbergi Strand, 1904 — Europa, Russia, Ucraina Theridion bolivari Levi, 1959 — Messico Theridion bolum Levi, 1963 — Brasile Theridion bomae Schmidt, 1957 — Congo Theridion botanicum Levi, 1963 — Venezuela Theridion brachypus Thorell, 1887 — Myanmar Theridion bradyanum Strand, 1907 — Sudafrica Theridion brunellii Caporiacco, 1940 — Etiopia Theridion brunneonigrum Caporiacco, 1949 — Kenya Theridion bryantae Roewer, 1951 — Messico Theridion bullatum Tullgren, 1910 — Tanzania Theridion buxtoni Berland, 1929 — Isole Samoa, Isole Pitcairn (Oceano Pacifico meridionale), Isole Tuamotu Theridion calcynatum Holmberg, 1876 — dal Venezuela all'Argentina Theridion californicum Banks, 1904 — USA, Canada Theridion caliginosum Marples, 1955 — Isole Samoa Theridion cameronense Levi, 1957 — USA, Messico Theridion campestratum Simon, 1900 — Hawaii Theridion caplandense Strand, 1907 — Sudafrica Theridion carinatum Yin, Peng & Zhang, 2005 — Cina Theridion carpathium Brignoli, 1984 — Grecia Theridion cassinicola Simon, 1907 — Guinea-Bissau Theridion castaneum Franganillo, 1931 — Cuba Theridion catharina Marples, 1955 — Isole Samoa Theridion cavipalpe (F. O. P.-Cambridge, 1902) — Guatemala Theridion cazieri Levi, 1959 — Isole Bahama Theridion centrum Levi, 1959 — Panama Theridion chacoense Levi, 1963 — Bolivia Theridion chakinuense Wunderlich, 1995 — Turkmenistan Theridion chamberlini Caporiacco, 1949 — Kenya Theridion charitonowi Caporiacco, 1949 — Kenya Theridion cheimatos Gertsch & Archer, 1942 — USA Theridion cheni Zhu, 1998 — Cina Theridion chihuahua Levi, 1959 — Messico Theridion chiriqui Levi, 1959 — Panama Theridion chonetum Zhu, 1998 — Cina Theridion choroni Levi, 1963 — Venezuela Theridion cinctipes Banks, 1898 — USA, Messico Theridion cinereum Thorell, 1875 — Russia, Ucraina Theridion circumtextum Simon, 1907 — Guinea-Bissau Theridion climacode Thorell, 1898 — Myanmar Theridion clivalum Zhu, 1998 — Cina Theridion cloxum Roberts, 1983 — Isola di Aldabra (Oceano Indiano) Theridion clypeatellum Tullgren, 1910 — Africa orientale Theridion cochise Levi, 1963 — USA Theridion cochrum Levi, 1963 — Brasile Theridion cocosense Strand, 1906 — Costa Rica Theridion coenosum Thorell, 1887 — Myanmar Theridion cohni Levi, 1963 — Brasile Theridion coldeniae Baert & Maelfait, 1986 — Isole Galapagos Theridion comstocki Berland, 1920 — Africa orientale Theridion confusum O. P.-Cambridge, 1885 — Yarkand (Cina) Theridion conigerum Simon, 1914 — Europa, Russia Theridion contreras Levi, 1959 — Messico Theridion convexellum Roewer, 1942 — Queensland, Nuovo Galles del Sud Theridion convexisternum Caporiacco, 1949 — Kenya Theridion corcyraeum Brignoli, 1984 — Isola di Corfù (Grecia) Theridion costaricaense Levi, 1963 — dalla Costa Rica al Venezuela Theridion cowlesae Levi, 1957 — USA Theridion coyoacan Levi, 1959 — Messico Theridion crinigerum Simon, 1881 — Corsica, Italia, Marocco, Algeria Theridion cruciferum Urquhart, 1886 — Nuova Zelanda Theridion crucum Levi, 1959 — Messico Theridion cuspulatum Schmidt & Krause, 1998 — Isole Capo Verde Theridion cuyutlan Levi, 1963 — Messico Theridion cynicum Gertsch & Mulaik, 1936 — USA, Messico Theridion dafnense Levy & Amitai, 1982 — Israele Theridion darolense Strand, 1906 — Etiopia Theridion davisorum Levi, 1959 — Messico Theridion dayongense Zhu, 1998 — Cina Theridion decemmaculatum Thorell, 1890 — Sumatra Theridion decemperlatum (Simon, 1889) — Madagascar Theridion dedux O. P.-Cambridge, 1904 — Sudafrica Theridion delicatum O. P.-Cambridge, 1904 — Sudafrica Theridion derhami Simon, 1895 — Sierra Leone, Gabon, Bioko (Golfo di Guinea) Theridion desertum Ponomarev, 2008 — Kazakistan Theridion diadematum Chrysanthus, 1963 — Nuova Guinea Theridion dianiphum Rainbow, 1916 — Queensland Theridion differens Emerton, 1882 — USA, Canada Theridion dilucidum Simon, 1897 — dalla Costa Rica al Venezuela, Indie Occidentali Theridion dilutum Levi, 1957 — USA, Messico Theridion dividuum Gertsch & Archer, 1942 — USA Theridion Dominica (Piccole Antille) Levi, 1963 — Dominica (Piccole Antille) Theridion dreisbachi Levi, 1959 — Messico Theridion dubium Bradley, 1877 — Nuova Guinea Theridion dukouense Zhu, 1998 — Cina Theridion dulcineum Gertsch & Archer, 1942 — USA Theridion durbanicum Lawrence, 1947 — Sudafrica Theridion ecuadorense Levi, 1963 — Ecuador Theridion egyptium Fawzy & El Erksousy, 2002 — Egitto Theridion electum (O. P.-Cambridge, 1896) — Messico Theridion elegantissimum Roewer, 1942 — Taiwan Theridion elevatum Thorell, 1881 — Queensland Theridion elimatum L. Koch, 1882 — Maiorca (Isole Baleari) Theridion elisabethae Roewer, 1951 — Messico Theridion elli Sedgwick, 1973 — Cile Theridion ellicottense Dobyns & Bond, 1996 — USA Theridion emertoni Berland, 1920 — Africa orientale Theridion epiense Berland, 1938 — Nuove Ebridi Theridion eremum Levi, 1963 — Brasile Theridion eugeni Roewer, 1942 — Bioko (Golfo di Guinea) Theridion evexum Keyserling, 1884 — Messico, dalle Indie Occidentali al Brasile Theridion excavatum F. O. P.-Cambridge, 1902 — Guatemala Theridion exlineae Levi, 1963 — Ecuador, Perù Theridion expallidatum O. P.-Cambridge, 1885 — Yarkand (Cina) Theridion familiare O. P.-Cambridge, 1871 — Regione paleartica Theridion fastosum Keyserling, 1884 — Ecuador, Perù Theridion fatuhivaense Berland, 1933 — Isole Marchesi Theridion femorale Thorell, 1881 — Queensland Theridion femoratissimum Caporiacco, 1949 — Kenya Theridion fernandense Simon, 1907 — Bioko (Golfo di Guinea) Theridion filum Levi, 1963 — Brasile Theridion flabelliferum Urquhart, 1887 — Nuova Zelanda Theridion flavonotatum Becker, 1879 — USA, Cuba Theridion flavoornatum Thorell, 1898 — Myanmar Theridion fornicatum Simon, 1884 — Sudan Theridion frio Levi, 1959 — Messico Theridion frizzellorum Levi, 1963 — Colombia, Ecuador, Venezuela Theridion frondeum Hentz, 1850 — USA, Isole Bahama Theridion fruticum Simon, 1890 — Yemen Theridion fungosum Keyserling, 1886 — Ecuador, Perù Theridion furfuraceum Simon, 1914 — Francia, Algeria, Siria Theridion fuscodecoratum Rainbow, 1916 — Queensland Theridion fuscomaculatum Rainbow, 1916 — Queensland Theridion fuscum Franganillo, 1930 — Cuba Theridion gabardi Simon, 1895 — Sri Lanka Theridion galerum Levi, 1959 — Panama Theridion gekkonicum Levy & Amitai, 1982 — Israele Theridion geminipunctum Chamberlin, 1924 — USA, Messico Theridion genistae Simon, 1873 — dal Mediterraneo occidentale all'Uzbekistan Theridion genistae turanicum Charitonov, 1946 — Uzbekistan Theridion gentile Simon, 1881 — Corsica, Algeria Theridion gertschi Levi, 1959 — USA, Messico Theridion gibbum Rainbow, 1916 — Queensland