- family: Theridiidae
- genus: Robertus
- species: Robertus alpinus Dresco, 1959
- species: Robertus arcticus (Chamberlin & Ivie, 1947)
- species: Robertus arundineti (O. P.-Cambridge, 1871)
- species: Robertus banksi (Kaston, 1946)
- species: Robertus borealis (Kaston, 1946)
- species: Robertus calidus Knoflach, 1995
- species: Robertus cantabricus Fage, 1931
- species: Robertus cardesensis Dresco, 1959
- species: Robertus crosbyi (Kaston, 1946)
- species: Robertus emeishanensis Zhu, 1998
- species: Robertus eremophilus Chamberlin, in Chamberlin & Gertsch, 1928
- species: Robertus floridensis (Kaston, 1946)
- species: Robertus frivaldszkyi (Chyzer, in Chyzer & Kulczynski, 1894)
- species: Robertus frontatus (Banks, 1892)
- species: Robertus fuscus (Emerton, 1894)
- species: Robertus golovatchi Eskov, 1987
- species: Robertus heydemanni Wiehle, 1965
- species: Robertus insignis O. P.-Cambridge, 1907
- species: Robertus kastoni Eskov, 1987
- species: Robertus kuehnae Bauchhenss & Uhlenhaut, 1993
- species: Robertus laticeps (Keyserling, 1884)
- species: Robertus lividus (Blackwall, 1836)
- species: Robertus longipalpus (Kaston, 1946)
- species: Robertus lyrifer Holm, 1939
- species: Robertus mazaurici (Simon, 1901)
- species: Robertus mediterraneus Eskov, 1987
- species: Robertus monticola Simon, 1914
- species: Robertus naejangensis Seo, 2005
- species: Robertus neglectus (O. P.-Cambridge, 1871)
- species: Robertus nipponicus Yoshida, 1995
- species: Robertus nojimai Yoshida, 2002
- species: Robertus ogatai Yoshida, 1995
- species: Robertus potanini Schenkel, 1963
- species: Robertus pumilus (Emerton, 1909)
- species: Robertus riparius (Keyserling, 1886)
- species: Robertus saitoi Yoshida, 1995
- species: Robertus scoticus Jackson, 1914
- species: Robertus sibiricus Eskov, 1987
- species: Robertus similis (Kaston, 1946)
- species: Robertus spinifer (Emerton, 1909)
- species: Robertus truncorum (L. Koch, 1872)
- species: Robertus ungulatus Vogelsanger, 1944
- species: Robertus ussuricus Eskov, 1987
- species: Robertus vigerens (Chamberlin & Ivie, 1933)