Transferred to other genera:

Gongylidium atramontense Banks, 1911 -- see Mermessus

Gongylidium baltoroi Caporiacco, 1935 -- see Agyneta

Gongylidium clavum Zhu & Wen, 1980 -- see Eskovina

Gongylidium crassipalpe Caporiacco, 1935 -- see Collinsia

Gongylidium curvitarsis Emerton, 1917 -- see Hilaira

Gongylidium dentiferum (Westring, 1861) -- see Hylyphantes

Gongylidium improbum (O. Pickard-Cambridge, 1879) -- see Entelecara

Gongylidium lucidum (O. Pickard-Cambridge, 1873) -- see Styloctetor

Gongylidium macrochelis Emerton, 1917 -- see Macrargus

Gongylidium morum O. Pickard-Cambridge, 1894 -- see Diplocephalus

Gongylidium nigriceps Kulczyński, 1916 -- see Tmeticus

Gongylidium pascale (O. Pickard-Cambridge, 1873) -- see Erigone

Gongylidium perforatum (Thorell, 1871) -- see Trematocephalus

Gongylidium rugulosum Song & Li, 2010 -- see Vietnagone

Gongylidium septentrionale Kulczyński, 1908 -- see Hybauchenidium

Gongylidium tuberosum Emerton, 1915 -- see Oreonetides

Gongylidium unidentatum Emerton, 1917 -- see Vermontia

In synonymy:

Gongylidium crassipalpus (C. L. Koch, 1838, T from Micryphantes) = Gongylidium rufipes (Linnaeus, 1758) (Westring, 1851: 43, sub Erigone)

Gongylidium mundum (Blackwall, 1841, T from Neriene) = Gongylidium rufipes (Linnaeus, 1758) (Thorell, 1871a: 126, sub Erigone)

Gongylidium nigricans Menge, 1868 = Gongylidium rufipes (Linnaeus, 1758) (Thorell, 1871a: 126, sub Erigone)

Gongylidium priapeium (Walckenaer, 1841, T from Theridion) = Gongylidium rufipes (Linnaeus, 1758) (Simon, 1884a: 476)

Nomen dubium:

Gongylidium gebhardti Kolosváry, 1934b: 14, f. 6 (m, Hungary) -- Breitling et al., 2016b: 59