In synonymy:
Mesopneustes O. Pickard-Cambridge, 1894 = Theridula Emerton, 1882 (Simon, 1898a: 207)

type Theridion sphaerula Hentz, 1850; gender feminine; syn. of Theridula opulenta (Walckenaer, 1841)

N.B.: considered a senior synonym of Mesopneustes O. Pickard-Cambridge, 1894a: 126 [urn:lsid:nmbe.ch:spidergen:05545] (type M. nigrovittata O. Pickard-Cambridge, 1894 = Theridula gonygaster (Simon, 1873)) by Simon, 1898a: 207.

Transferred to other genera:
Theridula albipes Saito, 1935 -- see Chikunia
Theridula angula Tikader, 1970 -- see Chrysso
Theridula caudata Saito, 1933 -- see Chrysso
Theridula huberti Benoit, 1977 -- see Helenidion
Theridula ovsjannikovi Charitonov, 1950 -- see Chrysso
Theridula polita Mello-Leitão, 1947 -- see Dipoena
Theridula swatiae Biswas, Saha & Raychaydhuri, 1997 -- see Chrysso

In synonymy:
Theridula cordiformis (Butler, 1883) = Theridula opulenta (Walckenaer, 1841) (F. O. Pickard-Cambridge, 1902a: 393).
Theridula nigrovittata (O. Pickard-Cambridge, 1894) = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula nivipicta (Butler, 1883) = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula opulenta albomaculata Franganillo, 1936 = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula quadripunctata Keyserling, 1886 = Theridula opulenta (Walckenaer, 1841) (Petrunkevitch, 1911: 211).
Theridula quinqueguttata Keyserling, 1886 = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula regia Gertsch & Archer, 1942 = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula sphaerula (Hentz, 1850) = Theridula opulenta (Walckenaer, 1841) (Simon, 1894a: 545).
Theridula triangularis Keyserling, 1886 = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula tricornis O. Pickard-Cambridge, 1896 = Theridula gonygaster (Simon, 1873) (Levi, 1954c: 340).
Theridula ventillans (Keyserling, 1884, T from Theridion) = Theridula opulenta (Walckenaer, 1841) (Banks, 1893a: 125, sub Therdiula sphaerula).

Homonym replaced:
Theridula nigra (Keyserling, 1886) -- see Theridula nigerrima (see Petrunkevitch, 1911)

Nomen dubium:
Theridula theriella Strand, 1907d: 729, Strand, 1907o: 31 (f, Madagascar) -- Nentwig et al., 2020: 27.

Theridion aelleni Hubert, 1970b: 190, f. 1-4 (Dmf).
Theridula aelleni Knoflach, Rollard & Thaler, 2009: 257, f. 80-84 (mf, T from Theridion, removed from S of Theridion spinitarse, rejecting Brignoli, 1984b: 301).
Theridula aelleni Le Peru, 2011: 487, f. 857 (mf).

Theridula albonigra Caporiacco, 1949a: 396, f. 47 (Df).

Theridula albonigra vittata Caporiacco, 1949a: 397 (Df).

Theridula casas Levi, 1954c: 338, f. 6-8 (Dmf).

Theridula sphaerula Emerton, 1882: 25, pl. 5, f. 3-3b (m; misidentified per Levi, 1954c: 333).
Theridula sphaerula Keyserling, 1886b: 33, pl. 11, f. 152-152a (f; misidentified per Levi, 1954c: 333).
Theridula sphaerula Emerton, 1902: 128, f. 304 (misidentified per Levi, 1954c: 333).
Theridula opulenta Comstock, 1912: 355, f. 357-358 (m; misidentified per Levi, 1954c: 333).
Theridula opulenta Comstock, 1940: 370, f. 357-358 (m; misidentified per Levi, 1954c: 333).
Theridula opulenta Kaston, 1948: 99, f. 120-122 (m; misidentified per Levi, 1954c: 333).
Theridula emertoni Levi, 1954c: 333, f. 1-5 (Dmf).
Theridula emertoni Levi, 1961: 5, f. 4 (m).
Theridula emertoni Levi & Levi, 1962: 42, f. 69-71 (m).
Theridula emertoni Levi & Randolph, 1975: 47, f. 58-60 (m).
Theridula emertoni Kaston, 1977: 12, f. 1-2 (mf).
Theridula emertoni Roth, 1982: 47-11, f. 58-60 (m).
Theridula emertoni Roth, 1985: B43-10, f. 58-60 (m).
Theridula emertoni Roth, 1994: 184, f. 59-60 (mf).
Theridula emertoni Paquin & Dupérré, 2003: 224, f. 2506-2508 (mf).
Theridula emertoni Agnarsson, Coddington & Knoflach, 2007: 368, f. 120 (m).

Theridion facetum O. Pickard-Cambridge, 1894a: 143, pl. 16, f. 14 (Dm).
Theridula faceta F. O. Pickard-Cambridge, 1902a: 393, pl. 37, f. 9-10 (m, Df).
Theridula faceta Levi, 1954c: 337, f. 14-17 (mf).

Theridium gonygaster Simon, 1873a: 108, pl. 2, f. 24 (Dmf).
Chrysso nivipictus Butler, 1883: 764, pl. 57, f. 1 (Df) [urn:lsid:nmbe.ch:spidersp:062859].
Theridula triangularis Keyserling, 1886b: 30, pl. 11, f. 149 (Df) [urn:lsid:nmbe.ch:spidersp:062862].
Theridula quinqueguttata Keyserling, 1886b: 31, pl. 11, f. 150 (Df) [urn:lsid:nmbe.ch:spidersp:062863].
Theridula niveopictus Simon, 1889b: 229 (T from Chrysso, unjustified emendation).
Mesopneustes nigrovittata O. Pickard-Cambridge, 1894a: 126, pl. 17, f. 3-4 (Dm) [urn:lsid:nmbe.ch:spidersp:062864].
Theridula tricornis O. Pickard-Cambridge, 1896a: 208, pl. 25, f. 1 (Dj) [urn:lsid:nmbe.ch:spidersp:062865].
Theridula nigrovittata F. O. Pickard-Cambridge, 1902a: 392, pl. 37, f. 8 (m).
Theridula opulenta Petrunkevitch, 1930a: 189, f. 33-36 (mf; misidentified per Levi, 1954c: 340).
Theridula opulenta albomaculata Franganillo, 1936b: 79, f. 38 (D) [urn:lsid:nmbe.ch:spidersp:054685].
Theridula regia Gertsch & Archer, 1942: 2, f. 10 (Df) [urn:lsid:nmbe.ch:spidersp:054686].
Theridula gonygaster Levi, 1954c: 340, f. 18-22 (mf, removed from S of Theridula opulenta [rejecting Simon, 1894a: 545], S of T. nigrovittata, T. nivipicta [removed from S of T. opulenta, rejecting F. O. Pickard-Cambridge, 1902a: 393], T. opulenta albomaculata, T. quinqueguttata [removed from S of T. opulenta, rejecting F. O. Pickard-Cambridge, 1902a: 393], T. regia, T. triangularis [removed from S of T. opulenta, rejecting F. O. Pickard-Cambridge, 1902a: 393] and T. tricornis [removed from S of T. opulenta, rejecting Simon, 1898i: 862]).
Theridula gonygaster Levi, 1967c: 176, f. 5-8 (mf).
Theridula gonygaster Brignoli, 1969c: 262, f. 2-3, 6 (f).
Theridula gonygaster Roberts, 1983: 227, f. 36-37 (mf).
Theridula gonygaster Chikuni, 1989b: 40, f. 50 (f).
Theridula gonygaster Zhu, 1998: 75, f. 43A-D (mf).
Theridula gonygaster Song, Zhu & Chen, 1999: 148, f. 83H-J (mf).
Theridula gonygaster Melic, 2000b: 49, f. 1-4 (f).
Theridula gonygaster Yoshida, 2001c: 178, f. 79-82 (mf).
Theridula gonygaster Yoshida, 2003a: 116, f. 301-304 (mf).
Theridula gonygaster Trotta, 2005: 175, f. 456-457 (mf).
Theridula gonygaster Saaristo, 2006: 85, f. 97-99 (mf).
Theridula gonygaster Wunderlich, 2008b: 397, f. 598-603 (mf).
Theridula gonygaster Yoshida, 2009b: 384, f. 264-266 (mf).
Theridula gonygaster Saaristo, 2010: 274, f. 37.141-144 (mf).
Theridula gonygaster Kostanjšek, 2010: 27, f. 1a-b (f).
Theridula gonygaster Le Peru, 2011: 487, f. 858 (mf).
Theridula gonygaster Yin et al., 2012: 423, f. 189a-e (mf).
Theridula gonygaster Lecigne, 2018b: 77, f. 11J (m).
Theridula gonygaster Vanuytven, 2021: 42, 283, f. A.30a-b, B.313-314 (m).
Theridula gonygaster Sekhar & Sunil Jose, 2021a: 72, f. A-F, 2 (f).

Theridula iriomotensis Yoshida, 2001c: 177, f. 75-78 (Dmf).
Theridula iriomotensis Yoshida, 2003a: 117, f. 305-308 (mf).
Theridula iriomotensis Yoshida, 2009b: 384, f. 267-269 (mf).
Theridula iriomotensis Seo, 2018: 285, f. 19F-J (m).

Theridula multiguttata Keyserling, 1886b: 258, pl. 21, f. 306 (Df).
Theridula multiguttata Levi, 1966b: 127, f. 1-2 (f).

Dipoena nigra Keyserling, 1886b: 43, pl. 12, f. 158 (Dmf; preoccupied by Emerton, 1882, see Dipoena nigra) [urn:lsid:nmbe.ch:spidersp:062856].
Dipoena nigerrima Petrunkevitch, 1911: 174 (replacement name).
Theridula nigerrima Levi, 1963a: 138 (T from Dipoena).
Theridula nigerrima Levi, 1966b: 127, f. 3-5 (mf).
Theridula nigerrima Coddington, 1990: 18, f. 100 (m).

Theridion opulenta Walckenaer, 1841: 322 (Df).
Theridion sphaerula Hentz, 1850: 279, pl. 9, f. 22 (Df) [urn:lsid:nmbe.ch:spidersp:062857].
Chrysso cordiformis Butler, 1883: 763, pl. 57, f. 2 (Df; Levi, 1954c: 341 discusses the probable validity, but without revaldating it) [urn:lsid:nmbe.ch:spidersp:062858].
Theridium ventillans Keyserling, 1884a: 84, pl. 4, f. 53 (Dm) [urn:lsid:nmbe.ch:spidersp:062860].
Theridula quadripunctata Keyserling, 1886b: 32, pl. 11, f. 151 (Df) [urn:lsid:nmbe.ch:spidersp:062861].
Theridula cordiformis Simon, 1889b: 229 (T from Chrysso).
Theridula sphaerula Banks, 1893a: 125 (S of Theridion ventillans).
Theridula opulenta Simon, 1894a: 543, 545, 551, f. 561 (m, S of Theridula gonygaster [revalidated by Levi, 1954c: 340], Theridula nivipicta [rejected by Levi, 1954c: 340, see Theridula gonygaster] and T. sphaerula).
Theridula opulenta Simon, 1898i: 862 (S of Theridula tricornis; rejected by Levi, 1954c: 340, see Theridula gonygaster).
Theridula opulenta F. O. Pickard-Cambridge, 1902a: 393, pl. 37, f. 11-11d (f, S of Theridula cordiformis, T. nivipicta, T. quinqueguttata and T. triangularis [S of the latter three rejected by Levi, 1954c: 340, see Theridula gonygaster]).
Theridula opulenta Simon, 1907d: 260.
Theridula opulenta Petrunkevitch, 1911: 211 (S of Theridula quadripunctata).
Theridula ventillans Archer, 1946: 52 (removed from S of Theridula opulenta; S confirmed by Levi, 1954c: 334).
Theridula sphaerula Archer, 1946: 52 (removed from S of Theridula opulenta; S confirmed by Levi, 1954c: 334).
Theridula opulenta Levi, 1954c: 334, f. 9-13 (mf, S of Theridula sphaerula and T. ventillans confirmed [for T. sphaerula see also Theridula emertoni]).
Theridula opulenta Kaston, 1977: 12, f. 3-4 (mf).
Theridula opulenta Heimer, 1982: 43, f. 10 (m).
Theridula opulenta Hu, 1984: 174, f. 183.1-2 (m).
Theridula opulenta Agnarsson, 2004: 596, f. 81A-G, 82A-F (mf).
Theridula opulenta Agnarsson, Coddington & Knoflach, 2007: 366, f. 110 (m).
Theridula opulenta Le Peru, 2011: 487, f. 859 (mf).
Theridula opulenta Sekhar & Sunil Jose, 2021a: 72, f. A-F, 1 (f).

Theridula perlata Simon, 1889b: 228 (Dm).

Theridula puebla Levi, 1954c: 338, f. 23-25 (Dmf).

Theridula pulchra Berland, 1920c: 150, f. 180 (Dm).

Theridula sexpupillata Mello-Leitão, 1941c: 250 (Df).

Theridula zhangmuensis Hu, 2001: 589, f. 400.1-3 (Df).